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Finding the Fourth Proportional to 1,765.69, 2,648.54 and 791.79

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Solution

The fourth proportional to 1,765.69, 2,648.54 and 791.79 is: 1,187.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.69 : 2,648.54 = 791.79 : x
  2. Step 2: Convert to fraction form
    1,765.69/2,648.54 = 791.79/x
  3. Step 3: Cross multiply
    1,765.69x = 2,648.54 × 791.79
  4. Step 4: Simplify right side
    1,765.69x = 2,097,083.53
  5. Step 5: Solve for x
    x = 2,097,083.53/1,765.69
  6. Step 6: Final answer
    x = 1,187.69

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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.