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Finding the Fourth Proportional to 1,603.49, 2,212.79 and 940.37

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Solution

The fourth proportional to 1,603.49, 2,212.79 and 940.37 is: 1,297.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.49 : 2,212.79 = 940.37 : x
  2. Step 2: Convert to fraction form
    1,603.49/2,212.79 = 940.37/x
  3. Step 3: Cross multiply
    1,603.49x = 2,212.79 × 940.37
  4. Step 4: Simplify right side
    1,603.49x = 2,080,825.57
  5. Step 5: Solve for x
    x = 2,080,825.57/1,603.49
  6. Step 6: Final answer
    x = 1,297.69

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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.