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Finding the Fourth Proportional to 396,046.20, 594,069.30 and 129,815.40

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Solution

The fourth proportional to 396,046.20, 594,069.30 and 129,815.40 is: 194,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,046.20 : 594,069.30 = 129,815.40 : x
  2. Step 2: Convert to fraction form
    396,046.20/594,069.30 = 129,815.40/x
  3. Step 3: Cross multiply
    396,046.20x = 594,069.30 × 129,815.40
  4. Step 4: Simplify right side
    396,046.20x = 77,119,343,807.22
  5. Step 5: Solve for x
    x = 77,119,343,807.22/396,046.20
  6. Step 6: Final answer
    x = 194,723.10

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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.