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Finding the Fourth Proportional to 389,957.13, 584,956.47 and 123,738.48

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Solution

The fourth proportional to 389,957.13, 584,956.47 and 123,738.48 is: 185,614.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,957.13 : 584,956.47 = 123,738.48 : x
  2. Step 2: Convert to fraction form
    389,957.13/584,956.47 = 123,738.48/x
  3. Step 3: Cross multiply
    389,957.13x = 584,956.47 × 123,738.48
  4. Step 4: Simplify right side
    389,957.13x = 72,381,624,463.97
  5. Step 5: Solve for x
    x = 72,381,624,463.97/389,957.13
  6. Step 6: Final answer
    x = 185,614.31

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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.