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Finding the Fourth Proportional to 411.79, 568.28 and 225.29

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Solution

The fourth proportional to 411.79, 568.28 and 225.29 is: 310.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.79 : 568.28 = 225.29 : x
  2. Step 2: Convert to fraction form
    411.79/568.28 = 225.29/x
  3. Step 3: Cross multiply
    411.79x = 568.28 × 225.29
  4. Step 4: Simplify right side
    411.79x = 128,025.96
  5. Step 5: Solve for x
    x = 128,025.96/411.79
  6. Step 6: Final answer
    x = 310.90

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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.