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Finding the Fourth Proportional to 339,901.76, 509,393.35 and 129,424.88

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Solution

The fourth proportional to 339,901.76, 509,393.35 and 129,424.88 is: 193,962.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,901.76 : 509,393.35 = 129,424.88 : x
  2. Step 2: Convert to fraction form
    339,901.76/509,393.35 = 129,424.88/x
  3. Step 3: Cross multiply
    339,901.76x = 509,393.35 × 129,424.88
  4. Step 4: Simplify right side
    339,901.76x = 65,928,171,766.47
  5. Step 5: Solve for x
    x = 65,928,171,766.47/339,901.76
  6. Step 6: Final answer
    x = 193,962.43

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1.5x scale

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.