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Finding the Third Proportional to 413 and 822.50

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Solution

The third proportional to 413 and 822.50 is: 1,638.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    413 : 822.50 = 822.50 : x
  2. Step 2: Convert to fraction form
    413/822.50 = 822.50/x
  3. Step 3: Cross multiply
    413x = 822.50 × 822.50
  4. Step 4: Simplify right side
    413x = 676,506.25
  5. Step 5: Solve for x
    x = 676,506.25/413
  6. Step 6: Final answer
    x = 1,638.03

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Why These Related Problems?

These problems maintain the same ratio (1.99) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.