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Finding the Fourth Proportional to 331,402.80, 496,974.60 and 120,932.40

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Solution

The fourth proportional to 331,402.80, 496,974.60 and 120,932.40 is: 181,351.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,402.80 : 496,974.60 = 120,932.40 : x
  2. Step 2: Convert to fraction form
    331,402.80/496,974.60 = 120,932.40/x
  3. Step 3: Cross multiply
    331,402.80x = 496,974.60 × 120,932.40
  4. Step 4: Simplify right side
    331,402.80x = 60,100,331,117.04
  5. Step 5: Solve for x
    x = 60,100,331,117.04/331,402.80
  6. Step 6: Final answer
    x = 181,351.31

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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.