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Finding the Third Proportional to 217,840.50 and 478,638

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Solution

The third proportional to 217,840.50 and 478,638 is: 1,051,660.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,840.50 : 478,638 = 478,638 : x
  2. Step 2: Convert to fraction form
    217,840.50/478,638 = 478,638/x
  3. Step 3: Cross multiply
    217,840.50x = 478,638 × 478,638
  4. Step 4: Simplify right side
    217,840.50x = 229,094,335,044
  5. Step 5: Solve for x
    x = 229,094,335,044/217,840.50
  6. Step 6: Final answer
    x = 1,051,660.89

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.