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Finding the Fourth Proportional to 480.67, 721.10 and 261.29

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Solution

The fourth proportional to 480.67, 721.10 and 261.29 is: 391.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.67 : 721.10 = 261.29 : x
  2. Step 2: Convert to fraction form
    480.67/721.10 = 261.29/x
  3. Step 3: Cross multiply
    480.67x = 721.10 × 261.29
  4. Step 4: Simplify right side
    480.67x = 188,413.27
  5. Step 5: Solve for x
    x = 188,413.27/480.67
  6. Step 6: Final answer
    x = 391.98

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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.