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Finding the Fourth Proportional to 343,375.20, 515,062.80 and 90,655.20

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Solution

The fourth proportional to 343,375.20, 515,062.80 and 90,655.20 is: 135,982.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,375.20 : 515,062.80 = 90,655.20 : x
  2. Step 2: Convert to fraction form
    343,375.20/515,062.80 = 90,655.20/x
  3. Step 3: Cross multiply
    343,375.20x = 515,062.80 × 90,655.20
  4. Step 4: Simplify right side
    343,375.20x = 46,693,121,146.56
  5. Step 5: Solve for x
    x = 46,693,121,146.56/343,375.20
  6. Step 6: Final answer
    x = 135,982.80

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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.