Home / 791.28-1,186.02-426.24

Finding the Fourth Proportional to 791.28, 1,186.02 and 426.24

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Solution

The fourth proportional to 791.28, 1,186.02 and 426.24 is: 638.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.28 : 1,186.02 = 426.24 : x
  2. Step 2: Convert to fraction form
    791.28/1,186.02 = 426.24/x
  3. Step 3: Cross multiply
    791.28x = 1,186.02 × 426.24
  4. Step 4: Simplify right side
    791.28x = 505,529.16
  5. Step 5: Solve for x
    x = 505,529.16/791.28
  6. Step 6: Final answer
    x = 638.88

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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.