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Finding the Fourth Proportional to 487,605.87, 731,145.82 and 221,221.04

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Solution

The fourth proportional to 487,605.87, 731,145.82 and 221,221.04 is: 331,712.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,605.87 : 731,145.82 = 221,221.04 : x
  2. Step 2: Convert to fraction form
    487,605.87/731,145.82 = 221,221.04/x
  3. Step 3: Cross multiply
    487,605.87x = 731,145.82 × 221,221.04
  4. Step 4: Simplify right side
    487,605.87x = 161,744,838,692.05
  5. Step 5: Solve for x
    x = 161,744,838,692.05/487,605.87
  6. Step 6: Final answer
    x = 331,712.25

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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.