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Finding the Fourth Proportional to 291.57, 402.42 and 173.54

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Solution

The fourth proportional to 291.57, 402.42 and 173.54 is: 239.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.57 : 402.42 = 173.54 : x
  2. Step 2: Convert to fraction form
    291.57/402.42 = 173.54/x
  3. Step 3: Cross multiply
    291.57x = 402.42 × 173.54
  4. Step 4: Simplify right side
    291.57x = 69,835.10
  5. Step 5: Solve for x
    x = 69,835.10/291.57
  6. Step 6: Final answer
    x = 239.51

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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.