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Finding the Fourth Proportional to 282.42, 422.84 and 145.17

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Solution

The fourth proportional to 282.42, 422.84 and 145.17 is: 217.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.42 : 422.84 = 145.17 : x
  2. Step 2: Convert to fraction form
    282.42/422.84 = 145.17/x
  3. Step 3: Cross multiply
    282.42x = 422.84 × 145.17
  4. Step 4: Simplify right side
    282.42x = 61,384.05
  5. Step 5: Solve for x
    x = 61,384.05/282.42
  6. Step 6: Final answer
    x = 217.35

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.