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Finding the Third Proportional to 921.38 and 2,009.81

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Solution

The third proportional to 921.38 and 2,009.81 is: 4,384.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.38 : 2,009.81 = 2,009.81 : x
  2. Step 2: Convert to fraction form
    921.38/2,009.81 = 2,009.81/x
  3. Step 3: Cross multiply
    921.38x = 2,009.81 × 2,009.81
  4. Step 4: Simplify right side
    921.38x = 4,039,346.29
  5. Step 5: Solve for x
    x = 4,039,346.29/921.38
  6. Step 6: Final answer
    x = 4,384.04

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.