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Finding the Third Proportional to 145,790 and 313,940

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Solution

The third proportional to 145,790 and 313,940 is: 676,029.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,790 : 313,940 = 313,940 : x
  2. Step 2: Convert to fraction form
    145,790/313,940 = 313,940/x
  3. Step 3: Cross multiply
    145,790x = 313,940 × 313,940
  4. Step 4: Simplify right side
    145,790x = 98,558,323,600
  5. Step 5: Solve for x
    x = 98,558,323,600/145,790
  6. Step 6: Final answer
    x = 676,029.38

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.