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Finding the Fourth Proportional to 252.51, 379.53 and 161.79

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Solution

The fourth proportional to 252.51, 379.53 and 161.79 is: 243.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.51 : 379.53 = 161.79 : x
  2. Step 2: Convert to fraction form
    252.51/379.53 = 161.79/x
  3. Step 3: Cross multiply
    252.51x = 379.53 × 161.79
  4. Step 4: Simplify right side
    252.51x = 61,404.16
  5. Step 5: Solve for x
    x = 61,404.16/252.51
  6. Step 6: Final answer
    x = 243.18

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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.