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Finding the Third Proportional to 638,741 and 1,390,881

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Solution

The third proportional to 638,741 and 1,390,881 is: 3,028,692.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,741 : 1,390,881 = 1,390,881 : x
  2. Step 2: Convert to fraction form
    638,741/1,390,881 = 1,390,881/x
  3. Step 3: Cross multiply
    638,741x = 1,390,881 × 1,390,881
  4. Step 4: Simplify right side
    638,741x = 1,934,549,956,161
  5. Step 5: Solve for x
    x = 1,934,549,956,161/638,741
  6. Step 6: Final answer
    x = 3,028,692.31

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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.