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Finding the Fourth Proportional to 1,571.87, 2,357.65 and 791.56

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Solution

The fourth proportional to 1,571.87, 2,357.65 and 791.56 is: 1,187.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.87 : 2,357.65 = 791.56 : x
  2. Step 2: Convert to fraction form
    1,571.87/2,357.65 = 791.56/x
  3. Step 3: Cross multiply
    1,571.87x = 2,357.65 × 791.56
  4. Step 4: Simplify right side
    1,571.87x = 1,866,221.43
  5. Step 5: Solve for x
    x = 1,866,221.43/1,571.87
  6. Step 6: Final answer
    x = 1,187.26

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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.