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Finding the Fourth Proportional to 540.37, 809.80 and 266.09

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Solution

The fourth proportional to 540.37, 809.80 and 266.09 is: 398.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.37 : 809.80 = 266.09 : x
  2. Step 2: Convert to fraction form
    540.37/809.80 = 266.09/x
  3. Step 3: Cross multiply
    540.37x = 809.80 × 266.09
  4. Step 4: Simplify right side
    540.37x = 215,474.97
  5. Step 5: Solve for x
    x = 215,474.97/540.37
  6. Step 6: Final answer
    x = 398.75

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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.