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Finding the Third Proportional to 931.13 and 1,939.50

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Solution

The third proportional to 931.13 and 1,939.50 is: 4,039.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    931.13 : 1,939.50 = 1,939.50 : x
  2. Step 2: Convert to fraction form
    931.13/1,939.50 = 1,939.50/x
  3. Step 3: Cross multiply
    931.13x = 1,939.50 × 1,939.50
  4. Step 4: Simplify right side
    931.13x = 3,761,660.25
  5. Step 5: Solve for x
    x = 3,761,660.25/931.13
  6. Step 6: Final answer
    x = 4,039.91

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.