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Finding the Fourth Proportional to 480.69, 721.08 and 172.53

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Solution

The fourth proportional to 480.69, 721.08 and 172.53 is: 258.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.69 : 721.08 = 172.53 : x
  2. Step 2: Convert to fraction form
    480.69/721.08 = 172.53/x
  3. Step 3: Cross multiply
    480.69x = 721.08 × 172.53
  4. Step 4: Simplify right side
    480.69x = 124,407.93
  5. Step 5: Solve for x
    x = 124,407.93/480.69
  6. Step 6: Final answer
    x = 258.81

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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.