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Finding the Fourth Proportional to 279.46, 387.71 and 268.18

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Solution

The fourth proportional to 279.46, 387.71 and 268.18 is: 372.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.46 : 387.71 = 268.18 : x
  2. Step 2: Convert to fraction form
    279.46/387.71 = 268.18/x
  3. Step 3: Cross multiply
    279.46x = 387.71 × 268.18
  4. Step 4: Simplify right side
    279.46x = 103,976.07
  5. Step 5: Solve for x
    x = 103,976.07/279.46
  6. Step 6: Final answer
    x = 372.06

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.