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Finding the Fourth Proportional to 186.87, 280.53 and 121.89

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Solution

The fourth proportional to 186.87, 280.53 and 121.89 is: 182.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.87 : 280.53 = 121.89 : x
  2. Step 2: Convert to fraction form
    186.87/280.53 = 121.89/x
  3. Step 3: Cross multiply
    186.87x = 280.53 × 121.89
  4. Step 4: Simplify right side
    186.87x = 34,193.80
  5. Step 5: Solve for x
    x = 34,193.80/186.87
  6. Step 6: Final answer
    x = 182.98

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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.