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Finding the Fourth Proportional to 185.25, 255.65 and 155.58

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Solution

The fourth proportional to 185.25, 255.65 and 155.58 is: 214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.25 : 255.65 = 155.58 : x
  2. Step 2: Convert to fraction form
    185.25/255.65 = 155.58/x
  3. Step 3: Cross multiply
    185.25x = 255.65 × 155.58
  4. Step 4: Simplify right side
    185.25x = 39,773.25
  5. Step 5: Solve for x
    x = 39,773.25/185.25
  6. Step 6: Final answer
    x = 214.70

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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.