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Finding the Fourth Proportional to 282, 423 and 76.55

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Solution

The fourth proportional to 282, 423 and 76.55 is: 114.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    282 : 423 = 76.55 : x
  2. Step 2: Convert to fraction form
    282/423 = 76.55/x
  3. Step 3: Cross multiply
    282x = 423 × 76.55
  4. Step 4: Simplify right side
    282x = 32,381.71
  5. Step 5: Solve for x
    x = 32,381.71/282
  6. Step 6: Final answer
    x = 114.83

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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.