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Finding the Fourth Proportional to 262.90, 394.08 and 171.66

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Solution

The fourth proportional to 262.90, 394.08 and 171.66 is: 257.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.90 : 394.08 = 171.66 : x
  2. Step 2: Convert to fraction form
    262.90/394.08 = 171.66/x
  3. Step 3: Cross multiply
    262.90x = 394.08 × 171.66
  4. Step 4: Simplify right side
    262.90x = 67,647.77
  5. Step 5: Solve for x
    x = 67,647.77/262.90
  6. Step 6: Final answer
    x = 257.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.