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Finding the Fourth Proportional to 339,876.24, 509,516.28 and 129,374.16

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Solution

The fourth proportional to 339,876.24, 509,516.28 and 129,374.16 is: 193,947.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,876.24 : 509,516.28 = 129,374.16 : x
  2. Step 2: Convert to fraction form
    339,876.24/509,516.28 = 129,374.16/x
  3. Step 3: Cross multiply
    339,876.24x = 509,516.28 × 129,374.16
  4. Step 4: Simplify right side
    339,876.24x = 65,918,240,731.32
  5. Step 5: Solve for x
    x = 65,918,240,731.32/339,876.24
  6. Step 6: Final answer
    x = 193,947.78

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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.