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Finding the Fourth Proportional to 449.80, 618.86 and 351.38

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Solution

The fourth proportional to 449.80, 618.86 and 351.38 is: 483.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.80 : 618.86 = 351.38 : x
  2. Step 2: Convert to fraction form
    449.80/618.86 = 351.38/x
  3. Step 3: Cross multiply
    449.80x = 618.86 × 351.38
  4. Step 4: Simplify right side
    449.80x = 217,453.27
  5. Step 5: Solve for x
    x = 217,453.27/449.80
  6. Step 6: Final answer
    x = 483.45

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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.