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Finding the Fourth Proportional to 539.55, 809.32 and 192.87

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Solution

The fourth proportional to 539.55, 809.32 and 192.87 is: 289.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.55 : 809.32 = 192.87 : x
  2. Step 2: Convert to fraction form
    539.55/809.32 = 192.87/x
  3. Step 3: Cross multiply
    539.55x = 809.32 × 192.87
  4. Step 4: Simplify right side
    539.55x = 156,093.55
  5. Step 5: Solve for x
    x = 156,093.55/539.55
  6. Step 6: Final answer
    x = 289.30

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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.