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Finding the Fourth Proportional to 1,321.02, 1,982.14 and 833.80

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Solution

The fourth proportional to 1,321.02, 1,982.14 and 833.80 is: 1,251.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.02 : 1,982.14 = 833.80 : x
  2. Step 2: Convert to fraction form
    1,321.02/1,982.14 = 833.80/x
  3. Step 3: Cross multiply
    1,321.02x = 1,982.14 × 833.80
  4. Step 4: Simplify right side
    1,321.02x = 1,652,708.33
  5. Step 5: Solve for x
    x = 1,652,708.33/1,321.02
  6. Step 6: Final answer
    x = 1,251.09

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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.