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Finding the Fourth Proportional to 174.78, 240.93 and 143.55

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Solution

The fourth proportional to 174.78, 240.93 and 143.55 is: 197.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.78 : 240.93 = 143.55 : x
  2. Step 2: Convert to fraction form
    174.78/240.93 = 143.55/x
  3. Step 3: Cross multiply
    174.78x = 240.93 × 143.55
  4. Step 4: Simplify right side
    174.78x = 34,585.50
  5. Step 5: Solve for x
    x = 34,585.50/174.78
  6. Step 6: Final answer
    x = 197.88

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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.