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Finding the Fourth Proportional to 493.71, 681.22 and 283.88

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Solution

The fourth proportional to 493.71, 681.22 and 283.88 is: 391.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.71 : 681.22 = 283.88 : x
  2. Step 2: Convert to fraction form
    493.71/681.22 = 283.88/x
  3. Step 3: Cross multiply
    493.71x = 681.22 × 283.88
  4. Step 4: Simplify right side
    493.71x = 193,385.73
  5. Step 5: Solve for x
    x = 193,385.73/493.71
  6. Step 6: Final answer
    x = 391.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.