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Finding the Fourth Proportional to 3,164.70, 4,365.39 and 1,983.72

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Solution

The fourth proportional to 3,164.70, 4,365.39 and 1,983.72 is: 2,736.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,164.70 : 4,365.39 = 1,983.72 : x
  2. Step 2: Convert to fraction form
    3,164.70/4,365.39 = 1,983.72/x
  3. Step 3: Cross multiply
    3,164.70x = 4,365.39 × 1,983.72
  4. Step 4: Simplify right side
    3,164.70x = 8,659,711.45
  5. Step 5: Solve for x
    x = 8,659,711.45/3,164.70
  6. Step 6: Final answer
    x = 2,736.35

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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.