Home / 1,210,404,807.80-1,815,607,211.70-720,628,782.20

Finding the Fourth Proportional to 1,210,404,807.80, 1,815,607,211.70 and 720,628,782.20

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Solution

The fourth proportional to 1,210,404,807.80, 1,815,607,211.70 and 720,628,782.20 is: 1,080,943,173.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,404,807.80 : 1,815,607,211.70 = 720,628,782.20 : x
  2. Step 2: Convert to fraction form
    1,210,404,807.80/1,815,607,211.70 = 720,628,782.20/x
  3. Step 3: Cross multiply
    1,210,404,807.80x = 1,815,607,211.70 × 720,628,782.20
  4. Step 4: Simplify right side
    1,210,404,807.80x = 1,308,378,813,920,908,800
  5. Step 5: Solve for x
    x = 1,308,378,813,920,908,800/1,210,404,807.80
  6. Step 6: Final answer
    x = 1,080,943,173.30

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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.