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Finding the Third Proportional to 390,255 and 851,232

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Solution

The third proportional to 390,255 and 851,232 is: 1,856,724.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,255 : 851,232 = 851,232 : x
  2. Step 2: Convert to fraction form
    390,255/851,232 = 851,232/x
  3. Step 3: Cross multiply
    390,255x = 851,232 × 851,232
  4. Step 4: Simplify right side
    390,255x = 724,595,917,824
  5. Step 5: Solve for x
    x = 724,595,917,824/390,255
  6. Step 6: Final answer
    x = 1,856,724.24

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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.