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Finding the Fourth Proportional to 411.68, 568.34 and 318.22

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Solution

The fourth proportional to 411.68, 568.34 and 318.22 is: 439.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.68 : 568.34 = 318.22 : x
  2. Step 2: Convert to fraction form
    411.68/568.34 = 318.22/x
  3. Step 3: Cross multiply
    411.68x = 568.34 × 318.22
  4. Step 4: Simplify right side
    411.68x = 180,857.15
  5. Step 5: Solve for x
    x = 180,857.15/411.68
  6. Step 6: Final answer
    x = 439.31

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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.