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Finding the Fourth Proportional to 242.79, 335.30 and 173.24

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Solution

The fourth proportional to 242.79, 335.30 and 173.24 is: 239.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.79 : 335.30 = 173.24 : x
  2. Step 2: Convert to fraction form
    242.79/335.30 = 173.24/x
  3. Step 3: Cross multiply
    242.79x = 335.30 × 173.24
  4. Step 4: Simplify right side
    242.79x = 58,084.83
  5. Step 5: Solve for x
    x = 58,084.83/242.79
  6. Step 6: Final answer
    x = 239.24

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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.