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Finding the Fourth Proportional to 412.11, 568.26 and 318.87

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Solution

The fourth proportional to 412.11, 568.26 and 318.87 is: 439.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.11 : 568.26 = 318.87 : x
  2. Step 2: Convert to fraction form
    412.11/568.26 = 318.87/x
  3. Step 3: Cross multiply
    412.11x = 568.26 × 318.87
  4. Step 4: Simplify right side
    412.11x = 181,201.07
  5. Step 5: Solve for x
    x = 181,201.07/412.11
  6. Step 6: Final answer
    x = 439.69

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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.