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Finding the Fourth Proportional to 279.15, 418.65 and 116.74

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Solution

The fourth proportional to 279.15, 418.65 and 116.74 is: 175.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.15 : 418.65 = 116.74 : x
  2. Step 2: Convert to fraction form
    279.15/418.65 = 116.74/x
  3. Step 3: Cross multiply
    279.15x = 418.65 × 116.74
  4. Step 4: Simplify right side
    279.15x = 48,873.20
  5. Step 5: Solve for x
    x = 48,873.20/279.15
  6. Step 6: Final answer
    x = 175.08

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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.