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Finding the Fourth Proportional to 296.11, 408.42 and 217.45

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Solution

The fourth proportional to 296.11, 408.42 and 217.45 is: 299.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.11 : 408.42 = 217.45 : x
  2. Step 2: Convert to fraction form
    296.11/408.42 = 217.45/x
  3. Step 3: Cross multiply
    296.11x = 408.42 × 217.45
  4. Step 4: Simplify right side
    296.11x = 88,810.93
  5. Step 5: Solve for x
    x = 88,810.93/296.11
  6. Step 6: Final answer
    x = 299.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.