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Finding the Fourth Proportional to 539.67, 809.28 and 193.09

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Solution

The fourth proportional to 539.67, 809.28 and 193.09 is: 289.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.67 : 809.28 = 193.09 : x
  2. Step 2: Convert to fraction form
    539.67/809.28 = 193.09/x
  3. Step 3: Cross multiply
    539.67x = 809.28 × 193.09
  4. Step 4: Simplify right side
    539.67x = 156,264.93
  5. Step 5: Solve for x
    x = 156,264.93/539.67
  6. Step 6: Final answer
    x = 289.56

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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.