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Finding the Fourth Proportional to 339,315.38, 508,972.64 and 86,595.88

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Solution

The fourth proportional to 339,315.38, 508,972.64 and 86,595.88 is: 129,893.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,315.38 : 508,972.64 = 86,595.88 : x
  2. Step 2: Convert to fraction form
    339,315.38/508,972.64 = 86,595.88/x
  3. Step 3: Cross multiply
    339,315.38x = 508,972.64 × 86,595.88
  4. Step 4: Simplify right side
    339,315.38x = 44,074,932,600.78
  5. Step 5: Solve for x
    x = 44,074,932,600.78/339,315.38
  6. Step 6: Final answer
    x = 129,893.71

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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.