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Finding the Fourth Proportional to 540.68, 809.34 and 355.37

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Solution

The fourth proportional to 540.68, 809.34 and 355.37 is: 531.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.68 : 809.34 = 355.37 : x
  2. Step 2: Convert to fraction form
    540.68/809.34 = 355.37/x
  3. Step 3: Cross multiply
    540.68x = 809.34 × 355.37
  4. Step 4: Simplify right side
    540.68x = 287,615.16
  5. Step 5: Solve for x
    x = 287,615.16/540.68
  6. Step 6: Final answer
    x = 531.95

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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.