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Finding the Fourth Proportional to 1,329.05, 1,992.90 and 773.93

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Solution

The fourth proportional to 1,329.05, 1,992.90 and 773.93 is: 1,160.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.05 : 1,992.90 = 773.93 : x
  2. Step 2: Convert to fraction form
    1,329.05/1,992.90 = 773.93/x
  3. Step 3: Cross multiply
    1,329.05x = 1,992.90 × 773.93
  4. Step 4: Simplify right side
    1,329.05x = 1,542,373.82
  5. Step 5: Solve for x
    x = 1,542,373.82/1,329.05
  6. Step 6: Final answer
    x = 1,160.51

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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.