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Finding the Fourth Proportional to 186.35, 256.90 and 130.92

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Solution

The fourth proportional to 186.35, 256.90 and 130.92 is: 180.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.35 : 256.90 = 130.92 : x
  2. Step 2: Convert to fraction form
    186.35/256.90 = 130.92/x
  3. Step 3: Cross multiply
    186.35x = 256.90 × 130.92
  4. Step 4: Simplify right side
    186.35x = 33,631.93
  5. Step 5: Solve for x
    x = 33,631.93/186.35
  6. Step 6: Final answer
    x = 180.48

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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.