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Finding the Fourth Proportional to 343,351.09, 515,015.70 and 90,623.80

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Solution

The fourth proportional to 343,351.09, 515,015.70 and 90,623.80 is: 135,932.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,351.09 : 515,015.70 = 90,623.80 : x
  2. Step 2: Convert to fraction form
    343,351.09/515,015.70 = 90,623.80/x
  3. Step 3: Cross multiply
    343,351.09x = 515,015.70 × 90,623.80
  4. Step 4: Simplify right side
    343,351.09x = 46,672,679,793.66
  5. Step 5: Solve for x
    x = 46,672,679,793.66/343,351.09
  6. Step 6: Final answer
    x = 135,932.81

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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.