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Finding the Fourth Proportional to 186.78, 256.20 and 183.72

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Solution

The fourth proportional to 186.78, 256.20 and 183.72 is: 252.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.78 : 256.20 = 183.72 : x
  2. Step 2: Convert to fraction form
    186.78/256.20 = 183.72/x
  3. Step 3: Cross multiply
    186.78x = 256.20 × 183.72
  4. Step 4: Simplify right side
    186.78x = 47,069.06
  5. Step 5: Solve for x
    x = 47,069.06/186.78
  6. Step 6: Final answer
    x = 252.00

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.