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Finding the Fourth Proportional to 480.85, 717.81 and 449.56

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Solution

The fourth proportional to 480.85, 717.81 and 449.56 is: 671.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.85 : 717.81 = 449.56 : x
  2. Step 2: Convert to fraction form
    480.85/717.81 = 449.56/x
  3. Step 3: Cross multiply
    480.85x = 717.81 × 449.56
  4. Step 4: Simplify right side
    480.85x = 322,698.66
  5. Step 5: Solve for x
    x = 322,698.66/480.85
  6. Step 6: Final answer
    x = 671.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.