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Finding the Fourth Proportional to 1,982.29, 2,971.47 and 940.46

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Solution

The fourth proportional to 1,982.29, 2,971.47 and 940.46 is: 1,409.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.29 : 2,971.47 = 940.46 : x
  2. Step 2: Convert to fraction form
    1,982.29/2,971.47 = 940.46/x
  3. Step 3: Cross multiply
    1,982.29x = 2,971.47 × 940.46
  4. Step 4: Simplify right side
    1,982.29x = 2,794,548.68
  5. Step 5: Solve for x
    x = 2,794,548.68/1,982.29
  6. Step 6: Final answer
    x = 1,409.76

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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.