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Finding the Fourth Proportional to 490.70, 677.12 and 269.62

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Solution

The fourth proportional to 490.70, 677.12 and 269.62 is: 372.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.70 : 677.12 = 269.62 : x
  2. Step 2: Convert to fraction form
    490.70/677.12 = 269.62/x
  3. Step 3: Cross multiply
    490.70x = 677.12 × 269.62
  4. Step 4: Simplify right side
    490.70x = 182,565.09
  5. Step 5: Solve for x
    x = 182,565.09/490.70
  6. Step 6: Final answer
    x = 372.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.