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Finding the Fourth Proportional to 411.80, 618.30 and 250.22

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Solution

The fourth proportional to 411.80, 618.30 and 250.22 is: 375.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.80 : 618.30 = 250.22 : x
  2. Step 2: Convert to fraction form
    411.80/618.30 = 250.22/x
  3. Step 3: Cross multiply
    411.80x = 618.30 × 250.22
  4. Step 4: Simplify right side
    411.80x = 154,711.03
  5. Step 5: Solve for x
    x = 154,711.03/411.80
  6. Step 6: Final answer
    x = 375.69

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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.