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Finding the Third Proportional to 638,747 and 1,390,894

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Solution

The third proportional to 638,747 and 1,390,894 is: 3,028,720.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,747 : 1,390,894 = 1,390,894 : x
  2. Step 2: Convert to fraction form
    638,747/1,390,894 = 1,390,894/x
  3. Step 3: Cross multiply
    638,747x = 1,390,894 × 1,390,894
  4. Step 4: Simplify right side
    638,747x = 1,934,586,119,236
  5. Step 5: Solve for x
    x = 1,934,586,119,236/638,747
  6. Step 6: Final answer
    x = 3,028,720.48

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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.