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Finding the Fourth Proportional to 715,287.83, 987,096.38 and 392,997.12

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Solution

The fourth proportional to 715,287.83, 987,096.38 and 392,997.12 is: 542,335.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,287.83 : 987,096.38 = 392,997.12 : x
  2. Step 2: Convert to fraction form
    715,287.83/987,096.38 = 392,997.12/x
  3. Step 3: Cross multiply
    715,287.83x = 987,096.38 × 392,997.12
  4. Step 4: Simplify right side
    715,287.83x = 387,926,032,537.44
  5. Step 5: Solve for x
    x = 387,926,032,537.44/715,287.83
  6. Step 6: Final answer
    x = 542,335.57

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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.