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Finding the Third Proportional to 239,220 and 518,076

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Solution

The third proportional to 239,220 and 518,076 is: 1,121,991.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,220 : 518,076 = 518,076 : x
  2. Step 2: Convert to fraction form
    239,220/518,076 = 518,076/x
  3. Step 3: Cross multiply
    239,220x = 518,076 × 518,076
  4. Step 4: Simplify right side
    239,220x = 268,402,741,776
  5. Step 5: Solve for x
    x = 268,402,741,776/239,220
  6. Step 6: Final answer
    x = 1,121,991.23

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.