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Finding the Fourth Proportional to 248.46, 343.17 and 215.70

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Solution

The fourth proportional to 248.46, 343.17 and 215.70 is: 297.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.46 : 343.17 = 215.70 : x
  2. Step 2: Convert to fraction form
    248.46/343.17 = 215.70/x
  3. Step 3: Cross multiply
    248.46x = 343.17 × 215.70
  4. Step 4: Simplify right side
    248.46x = 74,021.77
  5. Step 5: Solve for x
    x = 74,021.77/248.46
  6. Step 6: Final answer
    x = 297.92

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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.