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Finding the Third Proportional to 291,159 and 617,309

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Solution

The third proportional to 291,159 and 617,309 is: 1,308,805.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,159 : 617,309 = 617,309 : x
  2. Step 2: Convert to fraction form
    291,159/617,309 = 617,309/x
  3. Step 3: Cross multiply
    291,159x = 617,309 × 617,309
  4. Step 4: Simplify right side
    291,159x = 381,070,401,481
  5. Step 5: Solve for x
    x = 381,070,401,481/291,159
  6. Step 6: Final answer
    x = 1,308,805.16

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.