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Finding the Fourth Proportional to 322.43, 484.46 and 312.71

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Solution

The fourth proportional to 322.43, 484.46 and 312.71 is: 469.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.43 : 484.46 = 312.71 : x
  2. Step 2: Convert to fraction form
    322.43/484.46 = 312.71/x
  3. Step 3: Cross multiply
    322.43x = 484.46 × 312.71
  4. Step 4: Simplify right side
    322.43x = 151,493.92
  5. Step 5: Solve for x
    x = 151,493.92/322.43
  6. Step 6: Final answer
    x = 469.85

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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.