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Finding the Fourth Proportional to 1,193.31, 1,789.83 and 755.91

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Solution

The fourth proportional to 1,193.31, 1,789.83 and 755.91 is: 1,133.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.31 : 1,789.83 = 755.91 : x
  2. Step 2: Convert to fraction form
    1,193.31/1,789.83 = 755.91/x
  3. Step 3: Cross multiply
    1,193.31x = 1,789.83 × 755.91
  4. Step 4: Simplify right side
    1,193.31x = 1,352,950.40
  5. Step 5: Solve for x
    x = 1,352,950.40/1,193.31
  6. Step 6: Final answer
    x = 1,133.78

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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.