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Finding the Fourth Proportional to 411.26, 616.41 and 406.70

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Solution

The fourth proportional to 411.26, 616.41 and 406.70 is: 609.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.26 : 616.41 = 406.70 : x
  2. Step 2: Convert to fraction form
    411.26/616.41 = 406.70/x
  3. Step 3: Cross multiply
    411.26x = 616.41 × 406.70
  4. Step 4: Simplify right side
    411.26x = 250,690.86
  5. Step 5: Solve for x
    x = 250,690.86/411.26
  6. Step 6: Final answer
    x = 609.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.