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Finding the Third Proportional to 486,408 and 777,040

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Solution

The third proportional to 486,408 and 777,040 is: 1,241,326.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,408 : 777,040 = 777,040 : x
  2. Step 2: Convert to fraction form
    486,408/777,040 = 777,040/x
  3. Step 3: Cross multiply
    486,408x = 777,040 × 777,040
  4. Step 4: Simplify right side
    486,408x = 603,791,161,600
  5. Step 5: Solve for x
    x = 603,791,161,600/486,408
  6. Step 6: Final answer
    x = 1,241,326.54

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.