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Finding the Fourth Proportional to 174.40, 260.40 and 171.20

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Solution

The fourth proportional to 174.40, 260.40 and 171.20 is: 255.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.40 : 260.40 = 171.20 : x
  2. Step 2: Convert to fraction form
    174.40/260.40 = 171.20/x
  3. Step 3: Cross multiply
    174.40x = 260.40 × 171.20
  4. Step 4: Simplify right side
    174.40x = 44,580.48
  5. Step 5: Solve for x
    x = 44,580.48/174.40
  6. Step 6: Final answer
    x = 255.62

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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.