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Finding the Fourth Proportional to 279.28, 418.74 and 125.17

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Solution

The fourth proportional to 279.28, 418.74 and 125.17 is: 187.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.28 : 418.74 = 125.17 : x
  2. Step 2: Convert to fraction form
    279.28/418.74 = 125.17/x
  3. Step 3: Cross multiply
    279.28x = 418.74 × 125.17
  4. Step 4: Simplify right side
    279.28x = 52,415.20
  5. Step 5: Solve for x
    x = 52,415.20/279.28
  6. Step 6: Final answer
    x = 187.68

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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.