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Finding the Fourth Proportional to 339,251.60, 509,071.80 and 129,040.40

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Solution

The fourth proportional to 339,251.60, 509,071.80 and 129,040.40 is: 193,634.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,251.60 : 509,071.80 = 129,040.40 : x
  2. Step 2: Convert to fraction form
    339,251.60/509,071.80 = 129,040.40/x
  3. Step 3: Cross multiply
    339,251.60x = 509,071.80 × 129,040.40
  4. Step 4: Simplify right side
    339,251.60x = 65,690,828,700.72
  5. Step 5: Solve for x
    x = 65,690,828,700.72/339,251.60
  6. Step 6: Final answer
    x = 193,634.54

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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.