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Finding the Third Proportional to 187,290 and 400,824

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Solution

The third proportional to 187,290 and 400,824 is: 857,813.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,290 : 400,824 = 400,824 : x
  2. Step 2: Convert to fraction form
    187,290/400,824 = 400,824/x
  3. Step 3: Cross multiply
    187,290x = 400,824 × 400,824
  4. Step 4: Simplify right side
    187,290x = 160,659,878,976
  5. Step 5: Solve for x
    x = 160,659,878,976/187,290
  6. Step 6: Final answer
    x = 857,813.44

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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.