Home / 3,211.57-4,431.23-1,885.21

Finding the Fourth Proportional to 3,211.57, 4,431.23 and 1,885.21

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Solution

The fourth proportional to 3,211.57, 4,431.23 and 1,885.21 is: 2,601.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.57 : 4,431.23 = 1,885.21 : x
  2. Step 2: Convert to fraction form
    3,211.57/4,431.23 = 1,885.21/x
  3. Step 3: Cross multiply
    3,211.57x = 4,431.23 × 1,885.21
  4. Step 4: Simplify right side
    3,211.57x = 8,353,789.68
  5. Step 5: Solve for x
    x = 8,353,789.68/3,211.57
  6. Step 6: Final answer
    x = 2,601.15

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Half scale
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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.