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Finding the Fourth Proportional to 275.96, 413.96 and 138.93

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Solution

The fourth proportional to 275.96, 413.96 and 138.93 is: 208.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.96 : 413.96 = 138.93 : x
  2. Step 2: Convert to fraction form
    275.96/413.96 = 138.93/x
  3. Step 3: Cross multiply
    275.96x = 413.96 × 138.93
  4. Step 4: Simplify right side
    275.96x = 57,510.77
  5. Step 5: Solve for x
    x = 57,510.77/275.96
  6. Step 6: Final answer
    x = 208.41

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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.