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Finding the Fourth Proportional to 414.81, 618.56 and 411.11

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Solution

The fourth proportional to 414.81, 618.56 and 411.11 is: 613.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.81 : 618.56 = 411.11 : x
  2. Step 2: Convert to fraction form
    414.81/618.56 = 411.11/x
  3. Step 3: Cross multiply
    414.81x = 618.56 × 411.11
  4. Step 4: Simplify right side
    414.81x = 254,298.78
  5. Step 5: Solve for x
    x = 254,298.78/414.81
  6. Step 6: Final answer
    x = 613.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.