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Finding the Fourth Proportional to 1,366.92, 1,885.40 and 843.20

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Solution

The fourth proportional to 1,366.92, 1,885.40 and 843.20 is: 1,163.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.92 : 1,885.40 = 843.20 : x
  2. Step 2: Convert to fraction form
    1,366.92/1,885.40 = 843.20/x
  3. Step 3: Cross multiply
    1,366.92x = 1,885.40 × 843.20
  4. Step 4: Simplify right side
    1,366.92x = 1,589,769.28
  5. Step 5: Solve for x
    x = 1,589,769.28/1,366.92
  6. Step 6: Final answer
    x = 1,163.03

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Half scale
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Double scale
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Similar ratio
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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.