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Finding the Fourth Proportional to 660,711.20, 991,066.80 and 240,000.80

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Solution

The fourth proportional to 660,711.20, 991,066.80 and 240,000.80 is: 360,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,711.20 : 991,066.80 = 240,000.80 : x
  2. Step 2: Convert to fraction form
    660,711.20/991,066.80 = 240,000.80/x
  3. Step 3: Cross multiply
    660,711.20x = 991,066.80 × 240,000.80
  4. Step 4: Simplify right side
    660,711.20x = 237,856,824,853.44
  5. Step 5: Solve for x
    x = 237,856,824,853.44/660,711.20
  6. Step 6: Final answer
    x = 360,001.20

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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.