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Finding the Third Proportional to 256,854 and 340,815

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Solution

The third proportional to 256,854 and 340,815 is: 452,221.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,854 : 340,815 = 340,815 : x
  2. Step 2: Convert to fraction form
    256,854/340,815 = 340,815/x
  3. Step 3: Cross multiply
    256,854x = 340,815 × 340,815
  4. Step 4: Simplify right side
    256,854x = 116,154,864,225
  5. Step 5: Solve for x
    x = 116,154,864,225/256,854
  6. Step 6: Final answer
    x = 452,221.36

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.