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Finding the Third Proportional to 223,421 and 486,988

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Solution

The third proportional to 223,421 and 486,988 is: 1,061,481.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,421 : 486,988 = 486,988 : x
  2. Step 2: Convert to fraction form
    223,421/486,988 = 486,988/x
  3. Step 3: Cross multiply
    223,421x = 486,988 × 486,988
  4. Step 4: Simplify right side
    223,421x = 237,157,312,144
  5. Step 5: Solve for x
    x = 237,157,312,144/223,421
  6. Step 6: Final answer
    x = 1,061,481.74

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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.