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Finding the Fourth Proportional to 279.15, 418.53 and 116.88

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Solution

The fourth proportional to 279.15, 418.53 and 116.88 is: 175.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.15 : 418.53 = 116.88 : x
  2. Step 2: Convert to fraction form
    279.15/418.53 = 116.88/x
  3. Step 3: Cross multiply
    279.15x = 418.53 × 116.88
  4. Step 4: Simplify right side
    279.15x = 48,917.79
  5. Step 5: Solve for x
    x = 48,917.79/279.15
  6. Step 6: Final answer
    x = 175.24

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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.