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Finding the Fourth Proportional to 488,551.50, 674,122.32 and 307,134.90

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Solution

The fourth proportional to 488,551.50, 674,122.32 and 307,134.90 is: 423,796.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,551.50 : 674,122.32 = 307,134.90 : x
  2. Step 2: Convert to fraction form
    488,551.50/674,122.32 = 307,134.90/x
  3. Step 3: Cross multiply
    488,551.50x = 674,122.32 × 307,134.90
  4. Step 4: Simplify right side
    488,551.50x = 207,046,491,340.97
  5. Step 5: Solve for x
    x = 207,046,491,340.97/488,551.50
  6. Step 6: Final answer
    x = 423,796.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.