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Finding the Fourth Proportional to 411.40, 617.05 and 180.17

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Solution

The fourth proportional to 411.40, 617.05 and 180.17 is: 270.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.40 : 617.05 = 180.17 : x
  2. Step 2: Convert to fraction form
    411.40/617.05 = 180.17/x
  3. Step 3: Cross multiply
    411.40x = 617.05 × 180.17
  4. Step 4: Simplify right side
    411.40x = 111,173.90
  5. Step 5: Solve for x
    x = 111,173.90/411.40
  6. Step 6: Final answer
    x = 270.23

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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.