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Finding the Third Proportional to 420,651 and 912,653.25

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Solution

The third proportional to 420,651 and 912,653.25 is: 1,980,111.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,651 : 912,653.25 = 912,653.25 : x
  2. Step 2: Convert to fraction form
    420,651/912,653.25 = 912,653.25/x
  3. Step 3: Cross multiply
    420,651x = 912,653.25 × 912,653.25
  4. Step 4: Simplify right side
    420,651x = 832,935,954,735.56
  5. Step 5: Solve for x
    x = 832,935,954,735.56/420,651
  6. Step 6: Final answer
    x = 1,980,111.67

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.