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Finding the Third Proportional to 299,641.50 and 643,751.25

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Solution

The third proportional to 299,641.50 and 643,751.25 is: 1,383,038.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,641.50 : 643,751.25 = 643,751.25 : x
  2. Step 2: Convert to fraction form
    299,641.50/643,751.25 = 643,751.25/x
  3. Step 3: Cross multiply
    299,641.50x = 643,751.25 × 643,751.25
  4. Step 4: Simplify right side
    299,641.50x = 414,415,671,876.56
  5. Step 5: Solve for x
    x = 414,415,671,876.56/299,641.50
  6. Step 6: Final answer
    x = 1,383,038.30

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.