Home / 2,321.19-3,203.25-1,389.69

Finding the Fourth Proportional to 2,321.19, 3,203.25 and 1,389.69

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Solution

The fourth proportional to 2,321.19, 3,203.25 and 1,389.69 is: 1,917.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,321.19 : 3,203.25 = 1,389.69 : x
  2. Step 2: Convert to fraction form
    2,321.19/3,203.25 = 1,389.69/x
  3. Step 3: Cross multiply
    2,321.19x = 3,203.25 × 1,389.69
  4. Step 4: Simplify right side
    2,321.19x = 4,451,524.49
  5. Step 5: Solve for x
    x = 4,451,524.49/2,321.19
  6. Step 6: Final answer
    x = 1,917.78

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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.