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Finding the Fourth Proportional to 1,449.68, 2,174.88 and 791.60

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Solution

The fourth proportional to 1,449.68, 2,174.88 and 791.60 is: 1,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.68 : 2,174.88 = 791.60 : x
  2. Step 2: Convert to fraction form
    1,449.68/2,174.88 = 791.60/x
  3. Step 3: Cross multiply
    1,449.68x = 2,174.88 × 791.60
  4. Step 4: Simplify right side
    1,449.68x = 1,721,635.01
  5. Step 5: Solve for x
    x = 1,721,635.01/1,449.68
  6. Step 6: Final answer
    x = 1,187.60

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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.