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Finding the Fourth Proportional to 487,608.12, 731,149.17 and 221,223.30

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Solution

The fourth proportional to 487,608.12, 731,149.17 and 221,223.30 is: 331,715.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,608.12 : 731,149.17 = 221,223.30 : x
  2. Step 2: Convert to fraction form
    487,608.12/731,149.17 = 221,223.30/x
  3. Step 3: Cross multiply
    487,608.12x = 731,149.17 × 221,223.30
  4. Step 4: Simplify right side
    487,608.12x = 161,747,232,179.66
  5. Step 5: Solve for x
    x = 161,747,232,179.66/487,608.12
  6. Step 6: Final answer
    x = 331,715.62

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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.