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Finding the Fourth Proportional to 379,756.80, 569,136.90 and 279,447.30

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Solution

The fourth proportional to 379,756.80, 569,136.90 and 279,447.30 is: 418,804.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,756.80 : 569,136.90 = 279,447.30 : x
  2. Step 2: Convert to fraction form
    379,756.80/569,136.90 = 279,447.30/x
  3. Step 3: Cross multiply
    379,756.80x = 569,136.90 × 279,447.30
  4. Step 4: Simplify right side
    379,756.80x = 159,043,770,035.37
  5. Step 5: Solve for x
    x = 159,043,770,035.37/379,756.80
  6. Step 6: Final answer
    x = 418,804.27

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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.