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Finding the Fourth Proportional to 425,560.68, 638,584.38 and 215,214.12

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Solution

The fourth proportional to 425,560.68, 638,584.38 and 215,214.12 is: 322,944.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,560.68 : 638,584.38 = 215,214.12 : x
  2. Step 2: Convert to fraction form
    425,560.68/638,584.38 = 215,214.12/x
  3. Step 3: Cross multiply
    425,560.68x = 638,584.38 × 215,214.12
  4. Step 4: Simplify right side
    425,560.68x = 137,432,375,387.45
  5. Step 5: Solve for x
    x = 137,432,375,387.45/425,560.68
  6. Step 6: Final answer
    x = 322,944.25

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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.