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Finding the Fourth Proportional to 490.14, 676.13 and 303.66

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Solution

The fourth proportional to 490.14, 676.13 and 303.66 is: 418.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.14 : 676.13 = 303.66 : x
  2. Step 2: Convert to fraction form
    490.14/676.13 = 303.66/x
  3. Step 3: Cross multiply
    490.14x = 676.13 × 303.66
  4. Step 4: Simplify right side
    490.14x = 205,312.12
  5. Step 5: Solve for x
    x = 205,312.12/490.14
  6. Step 6: Final answer
    x = 418.88

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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.