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Finding the Fourth Proportional to 217.15, 325.33 and 125.66

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Solution

The fourth proportional to 217.15, 325.33 and 125.66 is: 188.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.15 : 325.33 = 125.66 : x
  2. Step 2: Convert to fraction form
    217.15/325.33 = 125.66/x
  3. Step 3: Cross multiply
    217.15x = 325.33 × 125.66
  4. Step 4: Simplify right side
    217.15x = 40,879.50
  5. Step 5: Solve for x
    x = 40,879.50/217.15
  6. Step 6: Final answer
    x = 188.25

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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.