Home / 1,321.38-1,815.62-1,236.06

Finding the Fourth Proportional to 1,321.38, 1,815.62 and 1,236.06

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Solution

The fourth proportional to 1,321.38, 1,815.62 and 1,236.06 is: 1,698.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.38 : 1,815.62 = 1,236.06 : x
  2. Step 2: Convert to fraction form
    1,321.38/1,815.62 = 1,236.06/x
  3. Step 3: Cross multiply
    1,321.38x = 1,815.62 × 1,236.06
  4. Step 4: Simplify right side
    1,321.38x = 2,244,209.08
  5. Step 5: Solve for x
    x = 2,244,209.08/1,321.38
  6. Step 6: Final answer
    x = 1,698.38

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.