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Finding the Fourth Proportional to 3,994.50, 5,991.96 and 1,221.24

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Solution

The fourth proportional to 3,994.50, 5,991.96 and 1,221.24 is: 1,831.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,994.50 : 5,991.96 = 1,221.24 : x
  2. Step 2: Convert to fraction form
    3,994.50/5,991.96 = 1,221.24/x
  3. Step 3: Cross multiply
    3,994.50x = 5,991.96 × 1,221.24
  4. Step 4: Simplify right side
    3,994.50x = 7,317,621.23
  5. Step 5: Solve for x
    x = 7,317,621.23/3,994.50
  6. Step 6: Final answer
    x = 1,831.92

Related Problems

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.