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Finding the Third Proportional to 408,890 and 879,988

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Solution

The third proportional to 408,890 and 879,988 is: 1,893,856.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,890 : 879,988 = 879,988 : x
  2. Step 2: Convert to fraction form
    408,890/879,988 = 879,988/x
  3. Step 3: Cross multiply
    408,890x = 879,988 × 879,988
  4. Step 4: Simplify right side
    408,890x = 774,378,880,144
  5. Step 5: Solve for x
    x = 774,378,880,144/408,890
  6. Step 6: Final answer
    x = 1,893,856.25

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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.