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Finding the Third Proportional to 145,404 and 313,721

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Solution

The third proportional to 145,404 and 313,721 is: 676,878.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,404 : 313,721 = 313,721 : x
  2. Step 2: Convert to fraction form
    145,404/313,721 = 313,721/x
  3. Step 3: Cross multiply
    145,404x = 313,721 × 313,721
  4. Step 4: Simplify right side
    145,404x = 98,420,865,841
  5. Step 5: Solve for x
    x = 98,420,865,841/145,404
  6. Step 6: Final answer
    x = 676,878.67

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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.