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Finding the Fourth Proportional to 1,843.88, 2,749.41 and 1,821.20

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Solution

The fourth proportional to 1,843.88, 2,749.41 and 1,821.20 is: 2,715.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,843.88 : 2,749.41 = 1,821.20 : x
  2. Step 2: Convert to fraction form
    1,843.88/2,749.41 = 1,821.20/x
  3. Step 3: Cross multiply
    1,843.88x = 2,749.41 × 1,821.20
  4. Step 4: Simplify right side
    1,843.88x = 5,007,225.49
  5. Step 5: Solve for x
    x = 5,007,225.49/1,843.88
  6. Step 6: Final answer
    x = 2,715.59

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.