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Finding the Fourth Proportional to 388,729.92, 583,176.68 and 220,330.92

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Solution

The fourth proportional to 388,729.92, 583,176.68 and 220,330.92 is: 330,542.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,729.92 : 583,176.68 = 220,330.92 : x
  2. Step 2: Convert to fraction form
    388,729.92/583,176.68 = 220,330.92/x
  3. Step 3: Cross multiply
    388,729.92x = 583,176.68 × 220,330.92
  4. Step 4: Simplify right side
    388,729.92x = 128,491,854,426.95
  5. Step 5: Solve for x
    x = 128,491,854,426.95/388,729.92
  6. Step 6: Final answer
    x = 330,542.74

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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.