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Finding the Third Proportional to 1,921.13 and 4,228.13

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Solution

The third proportional to 1,921.13 and 4,228.13 is: 9,305.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.13 : 4,228.13 = 4,228.13 : x
  2. Step 2: Convert to fraction form
    1,921.13/4,228.13 = 4,228.13/x
  3. Step 3: Cross multiply
    1,921.13x = 4,228.13 × 4,228.13
  4. Step 4: Simplify right side
    1,921.13x = 17,877,041.02
  5. Step 5: Solve for x
    x = 17,877,041.02/1,921.13
  6. Step 6: Final answer
    x = 9,305.51

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.