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Finding the Fourth Proportional to 275.67, 413.55 and 83.25

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Solution

The fourth proportional to 275.67, 413.55 and 83.25 is: 124.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.67 : 413.55 = 83.25 : x
  2. Step 2: Convert to fraction form
    275.67/413.55 = 83.25/x
  3. Step 3: Cross multiply
    275.67x = 413.55 × 83.25
  4. Step 4: Simplify right side
    275.67x = 34,428.04
  5. Step 5: Solve for x
    x = 34,428.04/275.67
  6. Step 6: Final answer
    x = 124.89

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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.