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Finding the Fourth Proportional to 283.76, 425.68 and 88.78

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Solution

The fourth proportional to 283.76, 425.68 and 88.78 is: 133.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.76 : 425.68 = 88.78 : x
  2. Step 2: Convert to fraction form
    283.76/425.68 = 88.78/x
  3. Step 3: Cross multiply
    283.76x = 425.68 × 88.78
  4. Step 4: Simplify right side
    283.76x = 37,791.87
  5. Step 5: Solve for x
    x = 37,791.87/283.76
  6. Step 6: Final answer
    x = 133.18

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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.