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Finding the Fourth Proportional to 411.36, 568.28 and 318.48

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Solution

The fourth proportional to 411.36, 568.28 and 318.48 is: 439.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.36 : 568.28 = 318.48 : x
  2. Step 2: Convert to fraction form
    411.36/568.28 = 318.48/x
  3. Step 3: Cross multiply
    411.36x = 568.28 × 318.48
  4. Step 4: Simplify right side
    411.36x = 180,985.81
  5. Step 5: Solve for x
    x = 180,985.81/411.36
  6. Step 6: Final answer
    x = 439.97

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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.