Home / 1,682.15-2,321.32-936.09

Finding the Fourth Proportional to 1,682.15, 2,321.32 and 936.09

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Solution

The fourth proportional to 1,682.15, 2,321.32 and 936.09 is: 1,291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,682.15 : 2,321.32 = 936.09 : x
  2. Step 2: Convert to fraction form
    1,682.15/2,321.32 = 936.09/x
  3. Step 3: Cross multiply
    1,682.15x = 2,321.32 × 936.09
  4. Step 4: Simplify right side
    1,682.15x = 2,172,964.44
  5. Step 5: Solve for x
    x = 2,172,964.44/1,682.15
  6. Step 6: Final answer
    x = 1,291.78

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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.