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Finding the Fourth Proportional to 339,215.35, 508,836.86 and 86,502.39

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Solution

The fourth proportional to 339,215.35, 508,836.86 and 86,502.39 is: 129,757.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,215.35 : 508,836.86 = 86,502.39 : x
  2. Step 2: Convert to fraction form
    339,215.35/508,836.86 = 86,502.39/x
  3. Step 3: Cross multiply
    339,215.35x = 508,836.86 × 86,502.39
  4. Step 4: Simplify right side
    339,215.35x = 44,015,604,510.10
  5. Step 5: Solve for x
    x = 44,015,604,510.10/339,215.35
  6. Step 6: Final answer
    x = 129,757.11

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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.