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Finding the Fourth Proportional to 1,173.82, 1,757.52 and 761.93

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Solution

The fourth proportional to 1,173.82, 1,757.52 and 761.93 is: 1,140.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.82 : 1,757.52 = 761.93 : x
  2. Step 2: Convert to fraction form
    1,173.82/1,757.52 = 761.93/x
  3. Step 3: Cross multiply
    1,173.82x = 1,757.52 × 761.93
  4. Step 4: Simplify right side
    1,173.82x = 1,339,107.21
  5. Step 5: Solve for x
    x = 1,339,107.21/1,173.82
  6. Step 6: Final answer
    x = 1,140.81

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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.