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Finding the Fourth Proportional to 414.79, 621.85 and 195.31

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Solution

The fourth proportional to 414.79, 621.85 and 195.31 is: 292.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.79 : 621.85 = 195.31 : x
  2. Step 2: Convert to fraction form
    414.79/621.85 = 195.31/x
  3. Step 3: Cross multiply
    414.79x = 621.85 × 195.31
  4. Step 4: Simplify right side
    414.79x = 121,454.18
  5. Step 5: Solve for x
    x = 121,454.18/414.79
  6. Step 6: Final answer
    x = 292.81

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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.