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Finding the Fourth Proportional to 388,713.72, 583,159.14 and 122,472.84

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Solution

The fourth proportional to 388,713.72, 583,159.14 and 122,472.84 is: 183,737.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,713.72 : 583,159.14 = 122,472.84 : x
  2. Step 2: Convert to fraction form
    388,713.72/583,159.14 = 122,472.84/x
  3. Step 3: Cross multiply
    388,713.72x = 583,159.14 × 122,472.84
  4. Step 4: Simplify right side
    388,713.72x = 71,421,156,047.76
  5. Step 5: Solve for x
    x = 71,421,156,047.76/388,713.72
  6. Step 6: Final answer
    x = 183,737.16

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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.