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Finding the Fourth Proportional to 718,287.50, 991,281.42 and 395,997.14

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Solution

The fourth proportional to 718,287.50, 991,281.42 and 395,997.14 is: 546,500.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,287.50 : 991,281.42 = 395,997.14 : x
  2. Step 2: Convert to fraction form
    718,287.50/991,281.42 = 395,997.14/x
  3. Step 3: Cross multiply
    718,287.50x = 991,281.42 × 395,997.14
  4. Step 4: Simplify right side
    718,287.50x = 392,544,607,255.14
  5. Step 5: Solve for x
    x = 392,544,607,255.14/718,287.50
  6. Step 6: Final answer
    x = 546,500.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.