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Finding the Fourth Proportional to 445,333.20, 667,999.80 and 129,800.40

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Solution

The fourth proportional to 445,333.20, 667,999.80 and 129,800.40 is: 194,700.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,333.20 : 667,999.80 = 129,800.40 : x
  2. Step 2: Convert to fraction form
    445,333.20/667,999.80 = 129,800.40/x
  3. Step 3: Cross multiply
    445,333.20x = 667,999.80 × 129,800.40
  4. Step 4: Simplify right side
    445,333.20x = 86,706,641,239.92
  5. Step 5: Solve for x
    x = 86,706,641,239.92/445,333.20
  6. Step 6: Final answer
    x = 194,700.60

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Similar ratio
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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.