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Finding the Third Proportional to 310,804 and 686,954

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Solution

The third proportional to 310,804 and 686,954 is: 1,518,338.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,804 : 686,954 = 686,954 : x
  2. Step 2: Convert to fraction form
    310,804/686,954 = 686,954/x
  3. Step 3: Cross multiply
    310,804x = 686,954 × 686,954
  4. Step 4: Simplify right side
    310,804x = 471,905,798,116
  5. Step 5: Solve for x
    x = 471,905,798,116/310,804
  6. Step 6: Final answer
    x = 1,518,338.88

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.