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Finding the Fourth Proportional to 174.30, 240.78 and 130.56

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Solution

The fourth proportional to 174.30, 240.78 and 130.56 is: 180.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.30 : 240.78 = 130.56 : x
  2. Step 2: Convert to fraction form
    174.30/240.78 = 130.56/x
  3. Step 3: Cross multiply
    174.30x = 240.78 × 130.56
  4. Step 4: Simplify right side
    174.30x = 31,436.24
  5. Step 5: Solve for x
    x = 31,436.24/174.30
  6. Step 6: Final answer
    x = 180.36

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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.