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Finding the Fourth Proportional to 173.20, 258.29 and 155

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Solution

The fourth proportional to 173.20, 258.29 and 155 is: 231.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.20 : 258.29 = 155 : x
  2. Step 2: Convert to fraction form
    173.20/258.29 = 155/x
  3. Step 3: Cross multiply
    173.20x = 258.29 × 155
  4. Step 4: Simplify right side
    173.20x = 40,034.95
  5. Step 5: Solve for x
    x = 40,034.95/173.20
  6. Step 6: Final answer
    x = 231.15

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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.