Home / 3,217.32-4,440-1,890.78

Finding the Fourth Proportional to 3,217.32, 4,440 and 1,890.78

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Solution

The fourth proportional to 3,217.32, 4,440 and 1,890.78 is: 2,609.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,217.32 : 4,440 = 1,890.78 : x
  2. Step 2: Convert to fraction form
    3,217.32/4,440 = 1,890.78/x
  3. Step 3: Cross multiply
    3,217.32x = 4,440 × 1,890.78
  4. Step 4: Simplify right side
    3,217.32x = 8,395,063.20
  5. Step 5: Solve for x
    x = 8,395,063.20/3,217.32
  6. Step 6: Final answer
    x = 2,609.33

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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.