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Finding the Fourth Proportional to 282.68, 424.20 and 186.56

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Solution

The fourth proportional to 282.68, 424.20 and 186.56 is: 279.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.68 : 424.20 = 186.56 : x
  2. Step 2: Convert to fraction form
    282.68/424.20 = 186.56/x
  3. Step 3: Cross multiply
    282.68x = 424.20 × 186.56
  4. Step 4: Simplify right side
    282.68x = 79,138.75
  5. Step 5: Solve for x
    x = 79,138.75/282.68
  6. Step 6: Final answer
    x = 279.96

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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.