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Finding the Fourth Proportional to 2,081.49, 3,122.28 and 782.97

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Solution

The fourth proportional to 2,081.49, 3,122.28 and 782.97 is: 1,174.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.49 : 3,122.28 = 782.97 : x
  2. Step 2: Convert to fraction form
    2,081.49/3,122.28 = 782.97/x
  3. Step 3: Cross multiply
    2,081.49x = 3,122.28 × 782.97
  4. Step 4: Simplify right side
    2,081.49x = 2,444,651.57
  5. Step 5: Solve for x
    x = 2,444,651.57/2,081.49
  6. Step 6: Final answer
    x = 1,174.47

Related Problems

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.