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Finding the Fourth Proportional to 339,011.26, 508,319.98 and 128,534.38

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Solution

The fourth proportional to 339,011.26, 508,319.98 and 128,534.38 is: 192,726.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,011.26 : 508,319.98 = 128,534.38 : x
  2. Step 2: Convert to fraction form
    339,011.26/508,319.98 = 128,534.38/x
  3. Step 3: Cross multiply
    339,011.26x = 508,319.98 × 128,534.38
  4. Step 4: Simplify right side
    339,011.26x = 65,336,593,470.91
  5. Step 5: Solve for x
    x = 65,336,593,470.91/339,011.26
  6. Step 6: Final answer
    x = 192,726.91

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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.