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Finding the Third Proportional to 288,408 and 621,190

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Solution

The third proportional to 288,408 and 621,190 is: 1,337,955.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,408 : 621,190 = 621,190 : x
  2. Step 2: Convert to fraction form
    288,408/621,190 = 621,190/x
  3. Step 3: Cross multiply
    288,408x = 621,190 × 621,190
  4. Step 4: Simplify right side
    288,408x = 385,877,016,100
  5. Step 5: Solve for x
    x = 385,877,016,100/288,408
  6. Step 6: Final answer
    x = 1,337,955.31

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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.