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Finding the Fourth Proportional to 217, 325.68 and 131.50

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Solution

The fourth proportional to 217, 325.68 and 131.50 is: 197.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    217 : 325.68 = 131.50 : x
  2. Step 2: Convert to fraction form
    217/325.68 = 131.50/x
  3. Step 3: Cross multiply
    217x = 325.68 × 131.50
  4. Step 4: Simplify right side
    217x = 42,826.92
  5. Step 5: Solve for x
    x = 42,826.92/217
  6. Step 6: Final answer
    x = 197.36

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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.