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Finding the Third Proportional to 142,878 and 305,439

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Solution

The third proportional to 142,878 and 305,439 is: 652,955.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,878 : 305,439 = 305,439 : x
  2. Step 2: Convert to fraction form
    142,878/305,439 = 305,439/x
  3. Step 3: Cross multiply
    142,878x = 305,439 × 305,439
  4. Step 4: Simplify right side
    142,878x = 93,292,982,721
  5. Step 5: Solve for x
    x = 93,292,982,721/142,878
  6. Step 6: Final answer
    x = 652,955.55

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.