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Finding the Fourth Proportional to 1,845.81, 2,767.10 and 691.29

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Solution

The fourth proportional to 1,845.81, 2,767.10 and 691.29 is: 1,036.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,845.81 : 2,767.10 = 691.29 : x
  2. Step 2: Convert to fraction form
    1,845.81/2,767.10 = 691.29/x
  3. Step 3: Cross multiply
    1,845.81x = 2,767.10 × 691.29
  4. Step 4: Simplify right side
    1,845.81x = 1,912,865.10
  5. Step 5: Solve for x
    x = 1,912,865.10/1,845.81
  6. Step 6: Final answer
    x = 1,036.33

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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.