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Finding the Fourth Proportional to 185.61, 278.64 and 131.55

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Solution

The fourth proportional to 185.61, 278.64 and 131.55 is: 197.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.61 : 278.64 = 131.55 : x
  2. Step 2: Convert to fraction form
    185.61/278.64 = 131.55/x
  3. Step 3: Cross multiply
    185.61x = 278.64 × 131.55
  4. Step 4: Simplify right side
    185.61x = 36,655.09
  5. Step 5: Solve for x
    x = 36,655.09/185.61
  6. Step 6: Final answer
    x = 197.48

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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.