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Finding the Fourth Proportional to 275.87, 412.99 and 217.68

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Solution

The fourth proportional to 275.87, 412.99 and 217.68 is: 325.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.87 : 412.99 = 217.68 : x
  2. Step 2: Convert to fraction form
    275.87/412.99 = 217.68/x
  3. Step 3: Cross multiply
    275.87x = 412.99 × 217.68
  4. Step 4: Simplify right side
    275.87x = 89,899.12
  5. Step 5: Solve for x
    x = 89,899.12/275.87
  6. Step 6: Final answer
    x = 325.88

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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.