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Finding the Fourth Proportional to 321,998.40, 482,997.60 and 203,803.20

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Solution

The fourth proportional to 321,998.40, 482,997.60 and 203,803.20 is: 305,704.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,998.40 : 482,997.60 = 203,803.20 : x
  2. Step 2: Convert to fraction form
    321,998.40/482,997.60 = 203,803.20/x
  3. Step 3: Cross multiply
    321,998.40x = 482,997.60 × 203,803.20
  4. Step 4: Simplify right side
    321,998.40x = 98,436,456,472.32
  5. Step 5: Solve for x
    x = 98,436,456,472.32/321,998.40
  6. Step 6: Final answer
    x = 305,704.80

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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.