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Finding the Fourth Proportional to 174.78, 260.76 and 156.54

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Solution

The fourth proportional to 174.78, 260.76 and 156.54 is: 233.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.78 : 260.76 = 156.54 : x
  2. Step 2: Convert to fraction form
    174.78/260.76 = 156.54/x
  3. Step 3: Cross multiply
    174.78x = 260.76 × 156.54
  4. Step 4: Simplify right side
    174.78x = 40,819.37
  5. Step 5: Solve for x
    x = 40,819.37/174.78
  6. Step 6: Final answer
    x = 233.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.