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Finding the Fourth Proportional to 282.17, 421.41 and 251.64

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Solution

The fourth proportional to 282.17, 421.41 and 251.64 is: 375.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.17 : 421.41 = 251.64 : x
  2. Step 2: Convert to fraction form
    282.17/421.41 = 251.64/x
  3. Step 3: Cross multiply
    282.17x = 421.41 × 251.64
  4. Step 4: Simplify right side
    282.17x = 106,043.61
  5. Step 5: Solve for x
    x = 106,043.61/282.17
  6. Step 6: Final answer
    x = 375.82

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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.