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Finding the Fourth Proportional to 642,672.20, 964,008.30 and 327,744.20

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Solution

The fourth proportional to 642,672.20, 964,008.30 and 327,744.20 is: 491,616.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,672.20 : 964,008.30 = 327,744.20 : x
  2. Step 2: Convert to fraction form
    642,672.20/964,008.30 = 327,744.20/x
  3. Step 3: Cross multiply
    642,672.20x = 964,008.30 × 327,744.20
  4. Step 4: Simplify right side
    642,672.20x = 315,948,129,076.86
  5. Step 5: Solve for x
    x = 315,948,129,076.86/642,672.20
  6. Step 6: Final answer
    x = 491,616.30

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Double scale
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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.