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Finding the Fourth Proportional to 490.05, 676.44 and 303.66

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Solution

The fourth proportional to 490.05, 676.44 and 303.66 is: 419.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.05 : 676.44 = 303.66 : x
  2. Step 2: Convert to fraction form
    490.05/676.44 = 303.66/x
  3. Step 3: Cross multiply
    490.05x = 676.44 × 303.66
  4. Step 4: Simplify right side
    490.05x = 205,407.77
  5. Step 5: Solve for x
    x = 205,407.77/490.05
  6. Step 6: Final answer
    x = 419.16

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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.