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Finding the Fourth Proportional to 480.85, 721.63 and 172.71

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Solution

The fourth proportional to 480.85, 721.63 and 172.71 is: 259.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.85 : 721.63 = 172.71 : x
  2. Step 2: Convert to fraction form
    480.85/721.63 = 172.71/x
  3. Step 3: Cross multiply
    480.85x = 721.63 × 172.71
  4. Step 4: Simplify right side
    480.85x = 124,632.72
  5. Step 5: Solve for x
    x = 124,632.72/480.85
  6. Step 6: Final answer
    x = 259.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.