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Finding the Fourth Proportional to 535.80, 804 and 261.78

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Solution

The fourth proportional to 535.80, 804 and 261.78 is: 392.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.80 : 804 = 261.78 : x
  2. Step 2: Convert to fraction form
    535.80/804 = 261.78/x
  3. Step 3: Cross multiply
    535.80x = 804 × 261.78
  4. Step 4: Simplify right side
    535.80x = 210,471.12
  5. Step 5: Solve for x
    x = 210,471.12/535.80
  6. Step 6: Final answer
    x = 392.82

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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.