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Finding the Third Proportional to 687,248 and 1,421,637

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Solution

The third proportional to 687,248 and 1,421,637 is: 2,940,789.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,248 : 1,421,637 = 1,421,637 : x
  2. Step 2: Convert to fraction form
    687,248/1,421,637 = 1,421,637/x
  3. Step 3: Cross multiply
    687,248x = 1,421,637 × 1,421,637
  4. Step 4: Simplify right side
    687,248x = 2,021,051,759,769
  5. Step 5: Solve for x
    x = 2,021,051,759,769/687,248
  6. Step 6: Final answer
    x = 2,940,789.58

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.