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Finding the Fourth Proportional to 186.05, 279.12 and 64.31

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Solution

The fourth proportional to 186.05, 279.12 and 64.31 is: 96.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.05 : 279.12 = 64.31 : x
  2. Step 2: Convert to fraction form
    186.05/279.12 = 64.31/x
  3. Step 3: Cross multiply
    186.05x = 279.12 × 64.31
  4. Step 4: Simplify right side
    186.05x = 17,949.94
  5. Step 5: Solve for x
    x = 17,949.94/186.05
  6. Step 6: Final answer
    x = 96.48

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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.