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Finding the Fourth Proportional to 379,760.30, 569,142.12 and 279,450.80

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Solution

The fourth proportional to 379,760.30, 569,142.12 and 279,450.80 is: 418,809.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,760.30 : 569,142.12 = 279,450.80 : x
  2. Step 2: Convert to fraction form
    379,760.30/569,142.12 = 279,450.80/x
  3. Step 3: Cross multiply
    379,760.30x = 569,142.12 × 279,450.80
  4. Step 4: Simplify right side
    379,760.30x = 159,047,220,747.70
  5. Step 5: Solve for x
    x = 159,047,220,747.70/379,760.30
  6. Step 6: Final answer
    x = 418,809.50

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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.