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Finding the Third Proportional to 291,220.50 and 639,543

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Solution

The third proportional to 291,220.50 and 639,543 is: 1,404,486.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,220.50 : 639,543 = 639,543 : x
  2. Step 2: Convert to fraction form
    291,220.50/639,543 = 639,543/x
  3. Step 3: Cross multiply
    291,220.50x = 639,543 × 639,543
  4. Step 4: Simplify right side
    291,220.50x = 409,015,248,849
  5. Step 5: Solve for x
    x = 409,015,248,849/291,220.50
  6. Step 6: Final answer
    x = 1,404,486.46

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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.