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Finding the Fourth Proportional to 252.32, 348.95 and 221.19

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Solution

The fourth proportional to 252.32, 348.95 and 221.19 is: 305.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.32 : 348.95 = 221.19 : x
  2. Step 2: Convert to fraction form
    252.32/348.95 = 221.19/x
  3. Step 3: Cross multiply
    252.32x = 348.95 × 221.19
  4. Step 4: Simplify right side
    252.32x = 77,183.14
  5. Step 5: Solve for x
    x = 77,183.14/252.32
  6. Step 6: Final answer
    x = 305.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.