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Finding the Fourth Proportional to 344.80, 517.92 and 290.80

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Solution

The fourth proportional to 344.80, 517.92 and 290.80 is: 436.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.80 : 517.92 = 290.80 : x
  2. Step 2: Convert to fraction form
    344.80/517.92 = 290.80/x
  3. Step 3: Cross multiply
    344.80x = 517.92 × 290.80
  4. Step 4: Simplify right side
    344.80x = 150,611.14
  5. Step 5: Solve for x
    x = 150,611.14/344.80
  6. Step 6: Final answer
    x = 436.81

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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.