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Finding the Third Proportional to 256,428.75 and 558,010.50

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Solution

The third proportional to 256,428.75 and 558,010.50 is: 1,214,277.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,428.75 : 558,010.50 = 558,010.50 : x
  2. Step 2: Convert to fraction form
    256,428.75/558,010.50 = 558,010.50/x
  3. Step 3: Cross multiply
    256,428.75x = 558,010.50 × 558,010.50
  4. Step 4: Simplify right side
    256,428.75x = 311,375,718,110.25
  5. Step 5: Solve for x
    x = 311,375,718,110.25/256,428.75
  6. Step 6: Final answer
    x = 1,214,277.72

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.