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Finding the Fourth Proportional to 515,062.20, 772,593.30 and 215,443.20

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Solution

The fourth proportional to 515,062.20, 772,593.30 and 215,443.20 is: 323,164.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,062.20 : 772,593.30 = 215,443.20 : x
  2. Step 2: Convert to fraction form
    515,062.20/772,593.30 = 215,443.20/x
  3. Step 3: Cross multiply
    515,062.20x = 772,593.30 × 215,443.20
  4. Step 4: Simplify right side
    515,062.20x = 166,449,972,850.56
  5. Step 5: Solve for x
    x = 166,449,972,850.56/515,062.20
  6. Step 6: Final answer
    x = 323,164.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.