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Finding the Fourth Proportional to 1,448.91, 2,171.45 and 791.07

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Solution

The fourth proportional to 1,448.91, 2,171.45 and 791.07 is: 1,185.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,448.91 : 2,171.45 = 791.07 : x
  2. Step 2: Convert to fraction form
    1,448.91/2,171.45 = 791.07/x
  3. Step 3: Cross multiply
    1,448.91x = 2,171.45 × 791.07
  4. Step 4: Simplify right side
    1,448.91x = 1,717,768.95
  5. Step 5: Solve for x
    x = 1,717,768.95/1,448.91
  6. Step 6: Final answer
    x = 1,185.56

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1.5x scale

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.