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Finding the Fourth Proportional to 186.07, 256.80 and 130.89

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Solution

The fourth proportional to 186.07, 256.80 and 130.89 is: 180.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.07 : 256.80 = 130.89 : x
  2. Step 2: Convert to fraction form
    186.07/256.80 = 130.89/x
  3. Step 3: Cross multiply
    186.07x = 256.80 × 130.89
  4. Step 4: Simplify right side
    186.07x = 33,612.55
  5. Step 5: Solve for x
    x = 33,612.55/186.07
  6. Step 6: Final answer
    x = 180.64

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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.