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Finding the Fourth Proportional to 490.90, 677.72 and 334.38

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Solution

The fourth proportional to 490.90, 677.72 and 334.38 is: 461.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.90 : 677.72 = 334.38 : x
  2. Step 2: Convert to fraction form
    490.90/677.72 = 334.38/x
  3. Step 3: Cross multiply
    490.90x = 677.72 × 334.38
  4. Step 4: Simplify right side
    490.90x = 226,616.01
  5. Step 5: Solve for x
    x = 226,616.01/490.90
  6. Step 6: Final answer
    x = 461.63

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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.