Home / 1,210,434,133.80-1,815,651,200.70-720,658,108.20

Finding the Fourth Proportional to 1,210,434,133.80, 1,815,651,200.70 and 720,658,108.20

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Solution

The fourth proportional to 1,210,434,133.80, 1,815,651,200.70 and 720,658,108.20 is: 1,080,987,162.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,434,133.80 : 1,815,651,200.70 = 720,658,108.20 : x
  2. Step 2: Convert to fraction form
    1,210,434,133.80/1,815,651,200.70 = 720,658,108.20/x
  3. Step 3: Cross multiply
    1,210,434,133.80x = 1,815,651,200.70 × 720,658,108.20
  4. Step 4: Simplify right side
    1,210,434,133.80x = 1,308,463,759,447,520,512
  5. Step 5: Solve for x
    x = 1,308,463,759,447,520,512/1,210,434,133.80
  6. Step 6: Final answer
    x = 1,080,987,162.30

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.