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Finding the Third Proportional to 318,104 and 686,030

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Solution

The third proportional to 318,104 and 686,030 is: 1,479,507.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,104 : 686,030 = 686,030 : x
  2. Step 2: Convert to fraction form
    318,104/686,030 = 686,030/x
  3. Step 3: Cross multiply
    318,104x = 686,030 × 686,030
  4. Step 4: Simplify right side
    318,104x = 470,637,160,900
  5. Step 5: Solve for x
    x = 470,637,160,900/318,104
  6. Step 6: Final answer
    x = 1,479,507.21

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.