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Finding the Fourth Proportional to 423,819.44, 635,489.54 and 139,433.03

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Solution

The fourth proportional to 423,819.44, 635,489.54 and 139,433.03 is: 209,070.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,819.44 : 635,489.54 = 139,433.03 : x
  2. Step 2: Convert to fraction form
    423,819.44/635,489.54 = 139,433.03/x
  3. Step 3: Cross multiply
    423,819.44x = 635,489.54 × 139,433.03
  4. Step 4: Simplify right side
    423,819.44x = 88,608,231,398.34
  5. Step 5: Solve for x
    x = 88,608,231,398.34/423,819.44
  6. Step 6: Final answer
    x = 209,070.71

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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.