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Finding the Fourth Proportional to 414.38, 621.56 and 186.38

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Solution

The fourth proportional to 414.38, 621.56 and 186.38 is: 279.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.38 : 621.56 = 186.38 : x
  2. Step 2: Convert to fraction form
    414.38/621.56 = 186.38/x
  3. Step 3: Cross multiply
    414.38x = 621.56 × 186.38
  4. Step 4: Simplify right side
    414.38x = 115,843.71
  5. Step 5: Solve for x
    x = 115,843.71/414.38
  6. Step 6: Final answer
    x = 279.56

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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.