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Finding the Fourth Proportional to 173.48, 260.36 and 77.28

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Solution

The fourth proportional to 173.48, 260.36 and 77.28 is: 115.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.48 : 260.36 = 77.28 : x
  2. Step 2: Convert to fraction form
    173.48/260.36 = 77.28/x
  3. Step 3: Cross multiply
    173.48x = 260.36 × 77.28
  4. Step 4: Simplify right side
    173.48x = 20,120.62
  5. Step 5: Solve for x
    x = 20,120.62/173.48
  6. Step 6: Final answer
    x = 115.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.