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Finding the Third Proportional to 143,736 and 312,639

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Solution

The third proportional to 143,736 and 312,639 is: 680,018.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,736 : 312,639 = 312,639 : x
  2. Step 2: Convert to fraction form
    143,736/312,639 = 312,639/x
  3. Step 3: Cross multiply
    143,736x = 312,639 × 312,639
  4. Step 4: Simplify right side
    143,736x = 97,743,144,321
  5. Step 5: Solve for x
    x = 97,743,144,321/143,736
  6. Step 6: Final answer
    x = 680,018.54

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.