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Finding the Fourth Proportional to 186.80, 280.16 and 58.48

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Solution

The fourth proportional to 186.80, 280.16 and 58.48 is: 87.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.80 : 280.16 = 58.48 : x
  2. Step 2: Convert to fraction form
    186.80/280.16 = 58.48/x
  3. Step 3: Cross multiply
    186.80x = 280.16 × 58.48
  4. Step 4: Simplify right side
    186.80x = 16,383.76
  5. Step 5: Solve for x
    x = 16,383.76/186.80
  6. Step 6: Final answer
    x = 87.71

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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.