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Finding the Fourth Proportional to 3,941.70, 5,912.55 and 3,221.70

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Solution

The fourth proportional to 3,941.70, 5,912.55 and 3,221.70 is: 4,832.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,941.70 : 5,912.55 = 3,221.70 : x
  2. Step 2: Convert to fraction form
    3,941.70/5,912.55 = 3,221.70/x
  3. Step 3: Cross multiply
    3,941.70x = 5,912.55 × 3,221.70
  4. Step 4: Simplify right side
    3,941.70x = 19,048,462.34
  5. Step 5: Solve for x
    x = 19,048,462.34/3,941.70
  6. Step 6: Final answer
    x = 4,832.55

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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.