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Finding the Fourth Proportional to 282.19, 422.48 and 208.75

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Solution

The fourth proportional to 282.19, 422.48 and 208.75 is: 312.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.19 : 422.48 = 208.75 : x
  2. Step 2: Convert to fraction form
    282.19/422.48 = 208.75/x
  3. Step 3: Cross multiply
    282.19x = 422.48 × 208.75
  4. Step 4: Simplify right side
    282.19x = 88,191.66
  5. Step 5: Solve for x
    x = 88,191.66/282.19
  6. Step 6: Final answer
    x = 312.53

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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.