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Finding the Fourth Proportional to 445,163.20, 667,744.80 and 129,630.40

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Solution

The fourth proportional to 445,163.20, 667,744.80 and 129,630.40 is: 194,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,163.20 : 667,744.80 = 129,630.40 : x
  2. Step 2: Convert to fraction form
    445,163.20/667,744.80 = 129,630.40/x
  3. Step 3: Cross multiply
    445,163.20x = 667,744.80 × 129,630.40
  4. Step 4: Simplify right side
    445,163.20x = 86,560,025,521.92
  5. Step 5: Solve for x
    x = 86,560,025,521.92/445,163.20
  6. Step 6: Final answer
    x = 194,445.60

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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.