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Finding the Fourth Proportional to 173.45, 260.21 and 57.89

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Solution

The fourth proportional to 173.45, 260.21 and 57.89 is: 86.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.45 : 260.21 = 57.89 : x
  2. Step 2: Convert to fraction form
    173.45/260.21 = 57.89/x
  3. Step 3: Cross multiply
    173.45x = 260.21 × 57.89
  4. Step 4: Simplify right side
    173.45x = 15,063.56
  5. Step 5: Solve for x
    x = 15,063.56/173.45
  6. Step 6: Final answer
    x = 86.85

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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.