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Finding the Fourth Proportional to 322.43, 481.10 and 315.95

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Solution

The fourth proportional to 322.43, 481.10 and 315.95 is: 471.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.43 : 481.10 = 315.95 : x
  2. Step 2: Convert to fraction form
    322.43/481.10 = 315.95/x
  3. Step 3: Cross multiply
    322.43x = 481.10 × 315.95
  4. Step 4: Simplify right side
    322.43x = 151,999.56
  5. Step 5: Solve for x
    x = 151,999.56/322.43
  6. Step 6: Final answer
    x = 471.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.