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Finding the Fourth Proportional to 186.43, 279.48 and 171.05

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Solution

The fourth proportional to 186.43, 279.48 and 171.05 is: 256.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.43 : 279.48 = 171.05 : x
  2. Step 2: Convert to fraction form
    186.43/279.48 = 171.05/x
  3. Step 3: Cross multiply
    186.43x = 279.48 × 171.05
  4. Step 4: Simplify right side
    186.43x = 47,805.46
  5. Step 5: Solve for x
    x = 47,805.46/186.43
  6. Step 6: Final answer
    x = 256.42

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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.