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Finding the Third Proportional to 486,374 and 776,990

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Solution

The third proportional to 486,374 and 776,990 is: 1,241,253.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,374 : 776,990 = 776,990 : x
  2. Step 2: Convert to fraction form
    486,374/776,990 = 776,990/x
  3. Step 3: Cross multiply
    486,374x = 776,990 × 776,990
  4. Step 4: Simplify right side
    486,374x = 603,713,460,100
  5. Step 5: Solve for x
    x = 603,713,460,100/486,374
  6. Step 6: Final answer
    x = 1,241,253.56

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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.