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Finding the Fourth Proportional to 185.79, 278.55 and 104.66

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Solution

The fourth proportional to 185.79, 278.55 and 104.66 is: 156.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.79 : 278.55 = 104.66 : x
  2. Step 2: Convert to fraction form
    185.79/278.55 = 104.66/x
  3. Step 3: Cross multiply
    185.79x = 278.55 × 104.66
  4. Step 4: Simplify right side
    185.79x = 29,151.65
  5. Step 5: Solve for x
    x = 29,151.65/185.79
  6. Step 6: Final answer
    x = 156.91

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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.