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Finding the Fourth Proportional to 435,658.60, 653,520.30 and 155,139.40

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Solution

The fourth proportional to 435,658.60, 653,520.30 and 155,139.40 is: 232,720.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    435,658.60 : 653,520.30 = 155,139.40 : x
  2. Step 2: Convert to fraction form
    435,658.60/653,520.30 = 155,139.40/x
  3. Step 3: Cross multiply
    435,658.60x = 653,520.30 × 155,139.40
  4. Step 4: Simplify right side
    435,658.60x = 101,386,747,229.82
  5. Step 5: Solve for x
    x = 101,386,747,229.82/435,658.60
  6. Step 6: Final answer
    x = 232,720.64

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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.