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Finding the Fourth Proportional to 425,698.92, 638,613.96 and 145,150.56

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Solution

The fourth proportional to 425,698.92, 638,613.96 and 145,150.56 is: 217,748.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,698.92 : 638,613.96 = 145,150.56 : x
  2. Step 2: Convert to fraction form
    425,698.92/638,613.96 = 145,150.56/x
  3. Step 3: Cross multiply
    425,698.92x = 638,613.96 × 145,150.56
  4. Step 4: Simplify right side
    425,698.92x = 92,695,173,917.82
  5. Step 5: Solve for x
    x = 92,695,173,917.82/425,698.92
  6. Step 6: Final answer
    x = 217,748.20

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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.