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Finding the Fourth Proportional to 773.88, 1,161.00 and 260.88

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Solution

The fourth proportional to 773.88, 1,161.00 and 260.88 is: 391.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.88 : 1,161.00 = 260.88 : x
  2. Step 2: Convert to fraction form
    773.88/1,161.00 = 260.88/x
  3. Step 3: Cross multiply
    773.88x = 1,161.00 × 260.88
  4. Step 4: Simplify right side
    773.88x = 302,874.57
  5. Step 5: Solve for x
    x = 302,874.57/773.88
  6. Step 6: Final answer
    x = 391.37

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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.