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Finding the Fourth Proportional to 411.68, 568.13 and 225.17

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Solution

The fourth proportional to 411.68, 568.13 and 225.17 is: 310.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.68 : 568.13 = 225.17 : x
  2. Step 2: Convert to fraction form
    411.68/568.13 = 225.17/x
  3. Step 3: Cross multiply
    411.68x = 568.13 × 225.17
  4. Step 4: Simplify right side
    411.68x = 127,928.46
  5. Step 5: Solve for x
    x = 127,928.46/411.68
  6. Step 6: Final answer
    x = 310.75

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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.