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Finding the Third Proportional to 290,790 and 437,640

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Solution

The third proportional to 290,790 and 437,640 is: 658,649.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,790 : 437,640 = 437,640 : x
  2. Step 2: Convert to fraction form
    290,790/437,640 = 437,640/x
  3. Step 3: Cross multiply
    290,790x = 437,640 × 437,640
  4. Step 4: Simplify right side
    290,790x = 191,528,769,600
  5. Step 5: Solve for x
    x = 191,528,769,600/290,790
  6. Step 6: Final answer
    x = 658,649.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.