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Finding the Fourth Proportional to 411.16, 617.05 and 167.86

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Solution

The fourth proportional to 411.16, 617.05 and 167.86 is: 251.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.16 : 617.05 = 167.86 : x
  2. Step 2: Convert to fraction form
    411.16/617.05 = 167.86/x
  3. Step 3: Cross multiply
    411.16x = 617.05 × 167.86
  4. Step 4: Simplify right side
    411.16x = 103,578.01
  5. Step 5: Solve for x
    x = 103,578.01/411.16
  6. Step 6: Final answer
    x = 251.92

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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.