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Finding the Fourth Proportional to 231.89, 347.55 and 186.29

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Solution

The fourth proportional to 231.89, 347.55 and 186.29 is: 279.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.89 : 347.55 = 186.29 : x
  2. Step 2: Convert to fraction form
    231.89/347.55 = 186.29/x
  3. Step 3: Cross multiply
    231.89x = 347.55 × 186.29
  4. Step 4: Simplify right side
    231.89x = 64,743.35
  5. Step 5: Solve for x
    x = 64,743.35/231.89
  6. Step 6: Final answer
    x = 279.20

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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.