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Finding the Fourth Proportional to 248.61, 342.90 and 161.13

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Solution

The fourth proportional to 248.61, 342.90 and 161.13 is: 222.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.61 : 342.90 = 161.13 : x
  2. Step 2: Convert to fraction form
    248.61/342.90 = 161.13/x
  3. Step 3: Cross multiply
    248.61x = 342.90 × 161.13
  4. Step 4: Simplify right side
    248.61x = 55,251.48
  5. Step 5: Solve for x
    x = 55,251.48/248.61
  6. Step 6: Final answer
    x = 222.24

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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.