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Finding the Fourth Proportional to 396,070.40, 594,251.40 and 129,839.60

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Solution

The fourth proportional to 396,070.40, 594,251.40 and 129,839.60 is: 194,807.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,070.40 : 594,251.40 = 129,839.60 : x
  2. Step 2: Convert to fraction form
    396,070.40/594,251.40 = 129,839.60/x
  3. Step 3: Cross multiply
    396,070.40x = 594,251.40 × 129,839.60
  4. Step 4: Simplify right side
    396,070.40x = 77,157,364,075.44
  5. Step 5: Solve for x
    x = 77,157,364,075.44/396,070.40
  6. Step 6: Final answer
    x = 194,807.20

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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.