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Finding the Third Proportional to 299,455.50 and 440,421

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Solution

The third proportional to 299,455.50 and 440,421 is: 647,744.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,455.50 : 440,421 = 440,421 : x
  2. Step 2: Convert to fraction form
    299,455.50/440,421 = 440,421/x
  3. Step 3: Cross multiply
    299,455.50x = 440,421 × 440,421
  4. Step 4: Simplify right side
    299,455.50x = 193,970,657,241
  5. Step 5: Solve for x
    x = 193,970,657,241/299,455.50
  6. Step 6: Final answer
    x = 647,744.51

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.