Home / 1,207,231,987.90-1,810,847,981.85-656,233,959.10

Finding the Fourth Proportional to 1,207,231,987.90, 1,810,847,981.85 and 656,233,959.10

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Solution

The fourth proportional to 1,207,231,987.90, 1,810,847,981.85 and 656,233,959.10 is: 984,350,938.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,231,987.90 : 1,810,847,981.85 = 656,233,959.10 : x
  2. Step 2: Convert to fraction form
    1,207,231,987.90/1,810,847,981.85 = 656,233,959.10/x
  3. Step 3: Cross multiply
    1,207,231,987.90x = 1,810,847,981.85 × 656,233,959.10
  4. Step 4: Simplify right side
    1,207,231,987.90x = 1,188,339,940,457,670,400
  5. Step 5: Solve for x
    x = 1,188,339,940,457,670,400/1,207,231,987.90
  6. Step 6: Final answer
    x = 984,350,938.65

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Double scale
Find fourth proportional to 1,207,231,988.90, 1,810,847,983.35 and 656,233,960.10
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.