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Finding the Fourth Proportional to 220,892.40, 331,338.60 and 203,785.20

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Solution

The fourth proportional to 220,892.40, 331,338.60 and 203,785.20 is: 305,677.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,892.40 : 331,338.60 = 203,785.20 : x
  2. Step 2: Convert to fraction form
    220,892.40/331,338.60 = 203,785.20/x
  3. Step 3: Cross multiply
    220,892.40x = 331,338.60 × 203,785.20
  4. Step 4: Simplify right side
    220,892.40x = 67,521,902,868.72
  5. Step 5: Solve for x
    x = 67,521,902,868.72/220,892.40
  6. Step 6: Final answer
    x = 305,677.80

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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.