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Finding the Fourth Proportional to 490.71, 677.18 and 269.64

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Solution

The fourth proportional to 490.71, 677.18 and 269.64 is: 372.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.71 : 677.18 = 269.64 : x
  2. Step 2: Convert to fraction form
    490.71/677.18 = 269.64/x
  3. Step 3: Cross multiply
    490.71x = 677.18 × 269.64
  4. Step 4: Simplify right side
    490.71x = 182,593.47
  5. Step 5: Solve for x
    x = 182,593.47/490.71
  6. Step 6: Final answer
    x = 372.10

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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.