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Finding the Fourth Proportional to 487,842.18, 731,763.36 and 321,591.30

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Solution

The fourth proportional to 487,842.18, 731,763.36 and 321,591.30 is: 482,387.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,842.18 : 731,763.36 = 321,591.30 : x
  2. Step 2: Convert to fraction form
    487,842.18/731,763.36 = 321,591.30/x
  3. Step 3: Cross multiply
    487,842.18x = 731,763.36 × 321,591.30
  4. Step 4: Simplify right side
    487,842.18x = 235,328,730,234.77
  5. Step 5: Solve for x
    x = 235,328,730,234.77/487,842.18
  6. Step 6: Final answer
    x = 482,387.01

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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.