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Finding the Fourth Proportional to 396,319.80, 594,479.70 and 130,121.40

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Solution

The fourth proportional to 396,319.80, 594,479.70 and 130,121.40 is: 195,182.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,319.80 : 594,479.70 = 130,121.40 : x
  2. Step 2: Convert to fraction form
    396,319.80/594,479.70 = 130,121.40/x
  3. Step 3: Cross multiply
    396,319.80x = 594,479.70 × 130,121.40
  4. Step 4: Simplify right side
    396,319.80x = 77,354,530,835.58
  5. Step 5: Solve for x
    x = 77,354,530,835.58/396,319.80
  6. Step 6: Final answer
    x = 195,182.10

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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.