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Finding the Fourth Proportional to 379,657.17, 523,910.30 and 218,517.39

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Solution

The fourth proportional to 379,657.17, 523,910.30 and 218,517.39 is: 301,544.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,657.17 : 523,910.30 = 218,517.39 : x
  2. Step 2: Convert to fraction form
    379,657.17/523,910.30 = 218,517.39/x
  3. Step 3: Cross multiply
    379,657.17x = 523,910.30 × 218,517.39
  4. Step 4: Simplify right side
    379,657.17x = 114,483,510,257.53
  5. Step 5: Solve for x
    x = 114,483,510,257.53/379,657.17
  6. Step 6: Final answer
    x = 301,544.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.