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Finding the Fourth Proportional to 490.15, 676.40 and 303.59

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Solution

The fourth proportional to 490.15, 676.40 and 303.59 is: 418.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.15 : 676.40 = 303.59 : x
  2. Step 2: Convert to fraction form
    490.15/676.40 = 303.59/x
  3. Step 3: Cross multiply
    490.15x = 676.40 × 303.59
  4. Step 4: Simplify right side
    490.15x = 205,343.38
  5. Step 5: Solve for x
    x = 205,343.38/490.15
  6. Step 6: Final answer
    x = 418.94

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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.