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Finding the Third Proportional to 100,782 and 219,708

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Solution

The third proportional to 100,782 and 219,708 is: 478,970.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,782 : 219,708 = 219,708 : x
  2. Step 2: Convert to fraction form
    100,782/219,708 = 219,708/x
  3. Step 3: Cross multiply
    100,782x = 219,708 × 219,708
  4. Step 4: Simplify right side
    100,782x = 48,271,605,264
  5. Step 5: Solve for x
    x = 48,271,605,264/100,782
  6. Step 6: Final answer
    x = 478,970.50

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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.