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Finding the Fourth Proportional to 379,861.94, 523,696.50 and 243,659.44

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Solution

The fourth proportional to 379,861.94, 523,696.50 and 243,659.44 is: 335,920.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,861.94 : 523,696.50 = 243,659.44 : x
  2. Step 2: Convert to fraction form
    379,861.94/523,696.50 = 243,659.44/x
  3. Step 3: Cross multiply
    379,861.94x = 523,696.50 × 243,659.44
  4. Step 4: Simplify right side
    379,861.94x = 127,603,595,919.96
  5. Step 5: Solve for x
    x = 127,603,595,919.96/379,861.94
  6. Step 6: Final answer
    x = 335,920.98

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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.