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Finding the Fourth Proportional to 328,087.32, 491,864.22 and 138,425.28

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Solution

The fourth proportional to 328,087.32, 491,864.22 and 138,425.28 is: 207,525.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,087.32 : 491,864.22 = 138,425.28 : x
  2. Step 2: Convert to fraction form
    328,087.32/491,864.22 = 138,425.28/x
  3. Step 3: Cross multiply
    328,087.32x = 491,864.22 × 138,425.28
  4. Step 4: Simplify right side
    328,087.32x = 68,086,442,375.48
  5. Step 5: Solve for x
    x = 68,086,442,375.48/328,087.32
  6. Step 6: Final answer
    x = 207,525.37

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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.