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Finding the Fourth Proportional to 411.53, 617.22 and 137.59

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Solution

The fourth proportional to 411.53, 617.22 and 137.59 is: 206.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.53 : 617.22 = 137.59 : x
  2. Step 2: Convert to fraction form
    411.53/617.22 = 137.59/x
  3. Step 3: Cross multiply
    411.53x = 617.22 × 137.59
  4. Step 4: Simplify right side
    411.53x = 84,921.76
  5. Step 5: Solve for x
    x = 84,921.76/411.53
  6. Step 6: Final answer
    x = 206.36

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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.