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Finding the Fourth Proportional to 1,603.28, 2,212.26 and 940.07

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Solution

The fourth proportional to 1,603.28, 2,212.26 and 940.07 is: 1,297.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.28 : 2,212.26 = 940.07 : x
  2. Step 2: Convert to fraction form
    1,603.28/2,212.26 = 940.07/x
  3. Step 3: Cross multiply
    1,603.28x = 2,212.26 × 940.07
  4. Step 4: Simplify right side
    1,603.28x = 2,079,679.26
  5. Step 5: Solve for x
    x = 2,079,679.26/1,603.28
  6. Step 6: Final answer
    x = 1,297.14

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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.