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Finding the Fourth Proportional to 424,704.68, 637,149.18 and 129,209

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Solution

The fourth proportional to 424,704.68, 637,149.18 and 129,209 is: 193,841.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,704.68 : 637,149.18 = 129,209 : x
  2. Step 2: Convert to fraction form
    424,704.68/637,149.18 = 129,209/x
  3. Step 3: Cross multiply
    424,704.68x = 637,149.18 × 129,209
  4. Step 4: Simplify right side
    424,704.68x = 82,325,408,398.62
  5. Step 5: Solve for x
    x = 82,325,408,398.62/424,704.68
  6. Step 6: Final answer
    x = 193,841.54

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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.