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Finding the Fourth Proportional to 322.28, 479.61 and 310.76

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Solution

The fourth proportional to 322.28, 479.61 and 310.76 is: 462.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.28 : 479.61 = 310.76 : x
  2. Step 2: Convert to fraction form
    322.28/479.61 = 310.76/x
  3. Step 3: Cross multiply
    322.28x = 479.61 × 310.76
  4. Step 4: Simplify right side
    322.28x = 149,043.60
  5. Step 5: Solve for x
    x = 149,043.60/322.28
  6. Step 6: Final answer
    x = 462.47

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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.