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Finding the Fourth Proportional to 490.95, 676.35 and 343.32

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Solution

The fourth proportional to 490.95, 676.35 and 343.32 is: 472.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.95 : 676.35 = 343.32 : x
  2. Step 2: Convert to fraction form
    490.95/676.35 = 343.32/x
  3. Step 3: Cross multiply
    490.95x = 676.35 × 343.32
  4. Step 4: Simplify right side
    490.95x = 232,204.48
  5. Step 5: Solve for x
    x = 232,204.48/490.95
  6. Step 6: Final answer
    x = 472.97

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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.