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Finding the Fourth Proportional to 1,603.70, 2,213.11 and 940.56

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Solution

The fourth proportional to 1,603.70, 2,213.11 and 940.56 is: 1,297.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.70 : 2,213.11 = 940.56 : x
  2. Step 2: Convert to fraction form
    1,603.70/2,213.11 = 940.56/x
  3. Step 3: Cross multiply
    1,603.70x = 2,213.11 × 940.56
  4. Step 4: Simplify right side
    1,603.70x = 2,081,555.62
  5. Step 5: Solve for x
    x = 2,081,555.62/1,603.70
  6. Step 6: Final answer
    x = 1,297.97

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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.