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Finding the Fourth Proportional to 185.16, 255.58 and 135.40

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Solution

The fourth proportional to 185.16, 255.58 and 135.40 is: 186.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.16 : 255.58 = 135.40 : x
  2. Step 2: Convert to fraction form
    185.16/255.58 = 135.40/x
  3. Step 3: Cross multiply
    185.16x = 255.58 × 135.40
  4. Step 4: Simplify right side
    185.16x = 34,603.58
  5. Step 5: Solve for x
    x = 34,603.58/185.16
  6. Step 6: Final answer
    x = 186.88

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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.