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Finding the Fourth Proportional to 173.55, 261.49 and 143.79

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Solution

The fourth proportional to 173.55, 261.49 and 143.79 is: 216.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.55 : 261.49 = 143.79 : x
  2. Step 2: Convert to fraction form
    173.55/261.49 = 143.79/x
  3. Step 3: Cross multiply
    173.55x = 261.49 × 143.79
  4. Step 4: Simplify right side
    173.55x = 37,599.65
  5. Step 5: Solve for x
    x = 37,599.65/173.55
  6. Step 6: Final answer
    x = 216.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.