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Finding the Fourth Proportional to 425,656.27, 638,414.46 and 172,926.55

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Solution

The fourth proportional to 425,656.27, 638,414.46 and 172,926.55 is: 259,361.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,656.27 : 638,414.46 = 172,926.55 : x
  2. Step 2: Convert to fraction form
    425,656.27/638,414.46 = 172,926.55/x
  3. Step 3: Cross multiply
    425,656.27x = 638,414.46 × 172,926.55
  4. Step 4: Simplify right side
    425,656.27x = 110,398,807,244.85
  5. Step 5: Solve for x
    x = 110,398,807,244.85/425,656.27
  6. Step 6: Final answer
    x = 259,361.41

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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.