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Finding the Fourth Proportional to 275.89, 413.29 and 145.70

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Solution

The fourth proportional to 275.89, 413.29 and 145.70 is: 218.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.89 : 413.29 = 145.70 : x
  2. Step 2: Convert to fraction form
    275.89/413.29 = 145.70/x
  3. Step 3: Cross multiply
    275.89x = 413.29 × 145.70
  4. Step 4: Simplify right side
    275.89x = 60,214.29
  5. Step 5: Solve for x
    x = 60,214.29/275.89
  6. Step 6: Final answer
    x = 218.26

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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.