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Finding the Fourth Proportional to 344.21, 516.60 and 275.55

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Solution

The fourth proportional to 344.21, 516.60 and 275.55 is: 413.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.21 : 516.60 = 275.55 : x
  2. Step 2: Convert to fraction form
    344.21/516.60 = 275.55/x
  3. Step 3: Cross multiply
    344.21x = 516.60 × 275.55
  4. Step 4: Simplify right side
    344.21x = 142,349.13
  5. Step 5: Solve for x
    x = 142,349.13/344.21
  6. Step 6: Final answer
    x = 413.56

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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.