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Finding the Fourth Proportional to 396,311.20, 594,466.80 and 130,080.40

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Solution

The fourth proportional to 396,311.20, 594,466.80 and 130,080.40 is: 195,120.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,311.20 : 594,466.80 = 130,080.40 : x
  2. Step 2: Convert to fraction form
    396,311.20/594,466.80 = 130,080.40/x
  3. Step 3: Cross multiply
    396,311.20x = 594,466.80 × 130,080.40
  4. Step 4: Simplify right side
    396,311.20x = 77,328,479,130.72
  5. Step 5: Solve for x
    x = 77,328,479,130.72/396,311.20
  6. Step 6: Final answer
    x = 195,120.60

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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.