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Finding the Fourth Proportional to 339,901.60, 509,393.14 and 129,424.72

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Solution

The fourth proportional to 339,901.60, 509,393.14 and 129,424.72 is: 193,962.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,901.60 : 509,393.14 = 129,424.72 : x
  2. Step 2: Convert to fraction form
    339,901.60/509,393.14 = 129,424.72/x
  3. Step 3: Cross multiply
    339,901.60x = 509,393.14 × 129,424.72
  4. Step 4: Simplify right side
    339,901.60x = 65,928,065,748.49
  5. Step 5: Solve for x
    x = 65,928,065,748.49/339,901.60
  6. Step 6: Final answer
    x = 193,962.21

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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.