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Finding the Third Proportional to 345,639 and 718,868

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Solution

The third proportional to 345,639 and 718,868 is: 1,495,118.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,639 : 718,868 = 718,868 : x
  2. Step 2: Convert to fraction form
    345,639/718,868 = 718,868/x
  3. Step 3: Cross multiply
    345,639x = 718,868 × 718,868
  4. Step 4: Simplify right side
    345,639x = 516,771,201,424
  5. Step 5: Solve for x
    x = 516,771,201,424/345,639
  6. Step 6: Final answer
    x = 1,495,118.32

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.