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Finding the Third Proportional to 240,111 and 515,211

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Solution

The third proportional to 240,111 and 515,211 is: 1,105,498.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,111 : 515,211 = 515,211 : x
  2. Step 2: Convert to fraction form
    240,111/515,211 = 515,211/x
  3. Step 3: Cross multiply
    240,111x = 515,211 × 515,211
  4. Step 4: Simplify right side
    240,111x = 265,442,374,521
  5. Step 5: Solve for x
    x = 265,442,374,521/240,111
  6. Step 6: Final answer
    x = 1,105,498.60

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.