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Finding the Fourth Proportional to 171.90, 235.98 and 170.28

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Solution

The fourth proportional to 171.90, 235.98 and 170.28 is: 233.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.90 : 235.98 = 170.28 : x
  2. Step 2: Convert to fraction form
    171.90/235.98 = 170.28/x
  3. Step 3: Cross multiply
    171.90x = 235.98 × 170.28
  4. Step 4: Simplify right side
    171.90x = 40,182.67
  5. Step 5: Solve for x
    x = 40,182.67/171.90
  6. Step 6: Final answer
    x = 233.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.