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Finding the Fourth Proportional to 396,078.60, 594,117.90 and 129,774.90

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Solution

The fourth proportional to 396,078.60, 594,117.90 and 129,774.90 is: 194,662.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,078.60 : 594,117.90 = 129,774.90 : x
  2. Step 2: Convert to fraction form
    396,078.60/594,117.90 = 129,774.90/x
  3. Step 3: Cross multiply
    396,078.60x = 594,117.90 × 129,774.90
  4. Step 4: Simplify right side
    396,078.60x = 77,101,591,060.71
  5. Step 5: Solve for x
    x = 77,101,591,060.71/396,078.60
  6. Step 6: Final answer
    x = 194,662.35

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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.