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Finding the Fourth Proportional to 186.76, 257.50 and 153.44

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Solution

The fourth proportional to 186.76, 257.50 and 153.44 is: 211.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.76 : 257.50 = 153.44 : x
  2. Step 2: Convert to fraction form
    186.76/257.50 = 153.44/x
  3. Step 3: Cross multiply
    186.76x = 257.50 × 153.44
  4. Step 4: Simplify right side
    186.76x = 39,510.80
  5. Step 5: Solve for x
    x = 39,510.80/186.76
  6. Step 6: Final answer
    x = 211.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.