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Finding the Fourth Proportional to 940.36, 1,403.81 and 817.37

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Solution

The fourth proportional to 940.36, 1,403.81 and 817.37 is: 1,220.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.36 : 1,403.81 = 817.37 : x
  2. Step 2: Convert to fraction form
    940.36/1,403.81 = 817.37/x
  3. Step 3: Cross multiply
    940.36x = 1,403.81 × 817.37
  4. Step 4: Simplify right side
    940.36x = 1,147,431.60
  5. Step 5: Solve for x
    x = 1,147,431.60/940.36
  6. Step 6: Final answer
    x = 1,220.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.