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Finding the Third Proportional to 378,145.13 and 813,638.25

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Solution

The third proportional to 378,145.13 and 813,638.25 is: 1,750,669.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,145.13 : 813,638.25 = 813,638.25 : x
  2. Step 2: Convert to fraction form
    378,145.13/813,638.25 = 813,638.25/x
  3. Step 3: Cross multiply
    378,145.13x = 813,638.25 × 813,638.25
  4. Step 4: Simplify right side
    378,145.13x = 662,007,201,863.06
  5. Step 5: Solve for x
    x = 662,007,201,863.06/378,145.13
  6. Step 6: Final answer
    x = 1,750,669.67

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.