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Finding the Fourth Proportional to 414.38, 621.03 and 316.52

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Solution

The fourth proportional to 414.38, 621.03 and 316.52 is: 474.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.38 : 621.03 = 316.52 : x
  2. Step 2: Convert to fraction form
    414.38/621.03 = 316.52/x
  3. Step 3: Cross multiply
    414.38x = 621.03 × 316.52
  4. Step 4: Simplify right side
    414.38x = 196,565.31
  5. Step 5: Solve for x
    x = 196,565.31/414.38
  6. Step 6: Final answer
    x = 474.37

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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.