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Finding the Third Proportional to 221,718 and 486,355.13

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Solution

The third proportional to 221,718 and 486,355.13 is: 1,066,856.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,718 : 486,355.13 = 486,355.13 : x
  2. Step 2: Convert to fraction form
    221,718/486,355.13 = 486,355.13/x
  3. Step 3: Cross multiply
    221,718x = 486,355.13 × 486,355.13
  4. Step 4: Simplify right side
    221,718x = 236,541,307,613.77
  5. Step 5: Solve for x
    x = 236,541,307,613.77/221,718
  6. Step 6: Final answer
    x = 1,066,856.58

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.