Home / 1,544.38-2,131.11-872.15

Finding the Fourth Proportional to 1,544.38, 2,131.11 and 872.15

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Solution

The fourth proportional to 1,544.38, 2,131.11 and 872.15 is: 1,203.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,544.38 : 2,131.11 = 872.15 : x
  2. Step 2: Convert to fraction form
    1,544.38/2,131.11 = 872.15/x
  3. Step 3: Cross multiply
    1,544.38x = 2,131.11 × 872.15
  4. Step 4: Simplify right side
    1,544.38x = 1,858,640.08
  5. Step 5: Solve for x
    x = 1,858,640.08/1,544.38
  6. Step 6: Final answer
    x = 1,203.49

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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.