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Finding the Fourth Proportional to 414.36, 618.12 and 353.88

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Solution

The fourth proportional to 414.36, 618.12 and 353.88 is: 527.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.36 : 618.12 = 353.88 : x
  2. Step 2: Convert to fraction form
    414.36/618.12 = 353.88/x
  3. Step 3: Cross multiply
    414.36x = 618.12 × 353.88
  4. Step 4: Simplify right side
    414.36x = 218,740.31
  5. Step 5: Solve for x
    x = 218,740.31/414.36
  6. Step 6: Final answer
    x = 527.90

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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.