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Finding the Fourth Proportional to 233.90, 322.18 and 171.56

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Solution

The fourth proportional to 233.90, 322.18 and 171.56 is: 236.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.90 : 322.18 = 171.56 : x
  2. Step 2: Convert to fraction form
    233.90/322.18 = 171.56/x
  3. Step 3: Cross multiply
    233.90x = 322.18 × 171.56
  4. Step 4: Simplify right side
    233.90x = 55,273.20
  5. Step 5: Solve for x
    x = 55,273.20/233.90
  6. Step 6: Final answer
    x = 236.31

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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.