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Finding the Fourth Proportional to 658,900.58, 987,317.10 and 392,515.47

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Solution

The fourth proportional to 658,900.58, 987,317.10 and 392,515.47 is: 588,157.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,900.58 : 987,317.10 = 392,515.47 : x
  2. Step 2: Convert to fraction form
    658,900.58/987,317.10 = 392,515.47/x
  3. Step 3: Cross multiply
    658,900.58x = 987,317.10 × 392,515.47
  4. Step 4: Simplify right side
    658,900.58x = 387,537,235,545.54
  5. Step 5: Solve for x
    x = 387,537,235,545.54/658,900.58
  6. Step 6: Final answer
    x = 588,157.38

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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.