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Finding the Fourth Proportional to 379,760.80, 569,142.90 and 279,451.30

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Solution

The fourth proportional to 379,760.80, 569,142.90 and 279,451.30 is: 418,810.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,760.80 : 569,142.90 = 279,451.30 : x
  2. Step 2: Convert to fraction form
    379,760.80/569,142.90 = 279,451.30/x
  3. Step 3: Cross multiply
    379,760.80x = 569,142.90 × 279,451.30
  4. Step 4: Simplify right side
    379,760.80x = 159,047,723,290.77
  5. Step 5: Solve for x
    x = 159,047,723,290.77/379,760.80
  6. Step 6: Final answer
    x = 418,810.27

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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.