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Finding the Fourth Proportional to 185.79, 278.67 and 117.11

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Solution

The fourth proportional to 185.79, 278.67 and 117.11 is: 175.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.79 : 278.67 = 117.11 : x
  2. Step 2: Convert to fraction form
    185.79/278.67 = 117.11/x
  3. Step 3: Cross multiply
    185.79x = 278.67 × 117.11
  4. Step 4: Simplify right side
    185.79x = 32,635.74
  5. Step 5: Solve for x
    x = 32,635.74/185.79
  6. Step 6: Final answer
    x = 175.66

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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.