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Finding the Fourth Proportional to 331,243.80, 496,865.70 and 279,922.20

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Solution

The fourth proportional to 331,243.80, 496,865.70 and 279,922.20 is: 419,883.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,243.80 : 496,865.70 = 279,922.20 : x
  2. Step 2: Convert to fraction form
    331,243.80/496,865.70 = 279,922.20/x
  3. Step 3: Cross multiply
    331,243.80x = 496,865.70 × 279,922.20
  4. Step 4: Simplify right side
    331,243.80x = 139,083,739,848.54
  5. Step 5: Solve for x
    x = 139,083,739,848.54/331,243.80
  6. Step 6: Final answer
    x = 419,883.30

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1.5x scale

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.