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Finding the Fourth Proportional to 715,851.89, 987,876.24 and 393,567.47

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Solution

The fourth proportional to 715,851.89, 987,876.24 and 393,567.47 is: 543,123.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,851.89 : 987,876.24 = 393,567.47 : x
  2. Step 2: Convert to fraction form
    715,851.89/987,876.24 = 393,567.47/x
  3. Step 3: Cross multiply
    715,851.89x = 987,876.24 × 393,567.47
  4. Step 4: Simplify right side
    715,851.89x = 388,795,952,449.91
  5. Step 5: Solve for x
    x = 388,795,952,449.91/715,851.89
  6. Step 6: Final answer
    x = 543,123.46

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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.