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Finding the Fourth Proportional to 640,168.25, 959,932.41 and 213,555.56

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Solution

The fourth proportional to 640,168.25, 959,932.41 and 213,555.56 is: 320,226.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,168.25 : 959,932.41 = 213,555.56 : x
  2. Step 2: Convert to fraction form
    640,168.25/959,932.41 = 213,555.56/x
  3. Step 3: Cross multiply
    640,168.25x = 959,932.41 × 213,555.56
  4. Step 4: Simplify right side
    640,168.25x = 204,998,903,379.70
  5. Step 5: Solve for x
    x = 204,998,903,379.70/640,168.25
  6. Step 6: Final answer
    x = 320,226.60

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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.