Home / 1,210,405,103.80-1,815,607,655.70-720,629,078.20

Finding the Fourth Proportional to 1,210,405,103.80, 1,815,607,655.70 and 720,629,078.20

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Solution

The fourth proportional to 1,210,405,103.80, 1,815,607,655.70 and 720,629,078.20 is: 1,080,943,617.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,405,103.80 : 1,815,607,655.70 = 720,629,078.20 : x
  2. Step 2: Convert to fraction form
    1,210,405,103.80/1,815,607,655.70 = 720,629,078.20/x
  3. Step 3: Cross multiply
    1,210,405,103.80x = 1,815,607,655.70 × 720,629,078.20
  4. Step 4: Simplify right side
    1,210,405,103.80x = 1,308,379,671,299,954,176
  5. Step 5: Solve for x
    x = 1,308,379,671,299,954,176/1,210,405,103.80
  6. Step 6: Final answer
    x = 1,080,943,617.30

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Double scale
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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.