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Finding the Fourth Proportional to 252.62, 348.70 and 215.90

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Solution

The fourth proportional to 252.62, 348.70 and 215.90 is: 298.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.62 : 348.70 = 215.90 : x
  2. Step 2: Convert to fraction form
    252.62/348.70 = 215.90/x
  3. Step 3: Cross multiply
    252.62x = 348.70 × 215.90
  4. Step 4: Simplify right side
    252.62x = 75,284.33
  5. Step 5: Solve for x
    x = 75,284.33/252.62
  6. Step 6: Final answer
    x = 298.01

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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.