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Finding the Fourth Proportional to 343,912.46, 515,891.48 and 91,189.43

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Solution

The fourth proportional to 343,912.46, 515,891.48 and 91,189.43 is: 136,790.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,912.46 : 515,891.48 = 91,189.43 : x
  2. Step 2: Convert to fraction form
    343,912.46/515,891.48 = 91,189.43/x
  3. Step 3: Cross multiply
    343,912.46x = 515,891.48 × 91,189.43
  4. Step 4: Simplify right side
    343,912.46x = 47,043,850,003.06
  5. Step 5: Solve for x
    x = 47,043,850,003.06/343,912.46
  6. Step 6: Final answer
    x = 136,790.19

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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.