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Finding the Fourth Proportional to 279.74, 386.03 and 161.73

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Solution

The fourth proportional to 279.74, 386.03 and 161.73 is: 223.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.74 : 386.03 = 161.73 : x
  2. Step 2: Convert to fraction form
    279.74/386.03 = 161.73/x
  3. Step 3: Cross multiply
    279.74x = 386.03 × 161.73
  4. Step 4: Simplify right side
    279.74x = 62,432.63
  5. Step 5: Solve for x
    x = 62,432.63/279.74
  6. Step 6: Final answer
    x = 223.18

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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.