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Finding the Fourth Proportional to 843.21, 1,163.55 and 493.83

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Solution

The fourth proportional to 843.21, 1,163.55 and 493.83 is: 681.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.21 : 1,163.55 = 493.83 : x
  2. Step 2: Convert to fraction form
    843.21/1,163.55 = 493.83/x
  3. Step 3: Cross multiply
    843.21x = 1,163.55 × 493.83
  4. Step 4: Simplify right side
    843.21x = 574,595.90
  5. Step 5: Solve for x
    x = 574,595.90/843.21
  6. Step 6: Final answer
    x = 681.44

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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.