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Finding the Fourth Proportional to 843.36, 1,163.72 and 493.84

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Solution

The fourth proportional to 843.36, 1,163.72 and 493.84 is: 681.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.36 : 1,163.72 = 493.84 : x
  2. Step 2: Convert to fraction form
    843.36/1,163.72 = 493.84/x
  3. Step 3: Cross multiply
    843.36x = 1,163.72 × 493.84
  4. Step 4: Simplify right side
    843.36x = 574,691.48
  5. Step 5: Solve for x
    x = 574,691.48/843.36
  6. Step 6: Final answer
    x = 681.43

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.