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Finding the Fourth Proportional to 617,404.80, 925,147.12 and 428,234.76

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Solution

The fourth proportional to 617,404.80, 925,147.12 and 428,234.76 is: 641,686.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,404.80 : 925,147.12 = 428,234.76 : x
  2. Step 2: Convert to fraction form
    617,404.80/925,147.12 = 428,234.76/x
  3. Step 3: Cross multiply
    617,404.80x = 925,147.12 × 428,234.76
  4. Step 4: Simplify right side
    617,404.80x = 396,180,154,897.89
  5. Step 5: Solve for x
    x = 396,180,154,897.89/617,404.80
  6. Step 6: Final answer
    x = 641,686.22

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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.