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Finding the Fourth Proportional to 411.40, 617.10 and 167.77

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Solution

The fourth proportional to 411.40, 617.10 and 167.77 is: 251.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.40 : 617.10 = 167.77 : x
  2. Step 2: Convert to fraction form
    411.40/617.10 = 167.77/x
  3. Step 3: Cross multiply
    411.40x = 617.10 × 167.77
  4. Step 4: Simplify right side
    411.40x = 103,529.32
  5. Step 5: Solve for x
    x = 103,529.32/411.40
  6. Step 6: Final answer
    x = 251.65

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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.