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Finding the Fourth Proportional to 185.85, 256.53 and 153.45

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Solution

The fourth proportional to 185.85, 256.53 and 153.45 is: 211.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.85 : 256.53 = 153.45 : x
  2. Step 2: Convert to fraction form
    185.85/256.53 = 153.45/x
  3. Step 3: Cross multiply
    185.85x = 256.53 × 153.45
  4. Step 4: Simplify right side
    185.85x = 39,364.53
  5. Step 5: Solve for x
    x = 39,364.53/185.85
  6. Step 6: Final answer
    x = 211.81

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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.