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Finding the Fourth Proportional to 319,691.82, 479,627.64 and 139,793.04

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Solution

The fourth proportional to 319,691.82, 479,627.64 and 139,793.04 is: 209,728.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,691.82 : 479,627.64 = 139,793.04 : x
  2. Step 2: Convert to fraction form
    319,691.82/479,627.64 = 139,793.04/x
  3. Step 3: Cross multiply
    319,691.82x = 479,627.64 × 139,793.04
  4. Step 4: Simplify right side
    319,691.82x = 67,048,605,863.63
  5. Step 5: Solve for x
    x = 67,048,605,863.63/319,691.82
  6. Step 6: Final answer
    x = 209,728.88

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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.