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Finding the Third Proportional to 217,131 and 478,437

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Solution

The third proportional to 217,131 and 478,437 is: 1,054,211.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,131 : 478,437 = 478,437 : x
  2. Step 2: Convert to fraction form
    217,131/478,437 = 478,437/x
  3. Step 3: Cross multiply
    217,131x = 478,437 × 478,437
  4. Step 4: Simplify right side
    217,131x = 228,901,962,969
  5. Step 5: Solve for x
    x = 228,901,962,969/217,131
  6. Step 6: Final answer
    x = 1,054,211.34

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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.