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Finding the Fourth Proportional to 2,079.93, 3,120.38 and 984

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Solution

The fourth proportional to 2,079.93, 3,120.38 and 984 is: 1,476.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.93 : 3,120.38 = 984 : x
  2. Step 2: Convert to fraction form
    2,079.93/3,120.38 = 984/x
  3. Step 3: Cross multiply
    2,079.93x = 3,120.38 × 984
  4. Step 4: Simplify right side
    2,079.93x = 3,070,453.92
  5. Step 5: Solve for x
    x = 3,070,453.92/2,079.93
  6. Step 6: Final answer
    x = 1,476.23

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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.