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Finding the Fourth Proportional to 443,326.40, 664,552.20 and 218,502.80

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Solution

The fourth proportional to 443,326.40, 664,552.20 and 218,502.80 is: 327,538.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,326.40 : 664,552.20 = 218,502.80 : x
  2. Step 2: Convert to fraction form
    443,326.40/664,552.20 = 218,502.80/x
  3. Step 3: Cross multiply
    443,326.40x = 664,552.20 × 218,502.80
  4. Step 4: Simplify right side
    443,326.40x = 145,206,516,446.16
  5. Step 5: Solve for x
    x = 145,206,516,446.16/443,326.40
  6. Step 6: Final answer
    x = 327,538.62

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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.