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Finding the Third Proportional to 143,640 and 302,805

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Solution

The third proportional to 143,640 and 302,805 is: 638,337.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,640 : 302,805 = 302,805 : x
  2. Step 2: Convert to fraction form
    143,640/302,805 = 302,805/x
  3. Step 3: Cross multiply
    143,640x = 302,805 × 302,805
  4. Step 4: Simplify right side
    143,640x = 91,690,868,025
  5. Step 5: Solve for x
    x = 91,690,868,025/143,640
  6. Step 6: Final answer
    x = 638,337.98

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.