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Finding the Fourth Proportional to 379,759.80, 569,141.40 and 279,450.30

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Solution

The fourth proportional to 379,759.80, 569,141.40 and 279,450.30 is: 418,808.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,759.80 : 569,141.40 = 279,450.30 : x
  2. Step 2: Convert to fraction form
    379,759.80/569,141.40 = 279,450.30/x
  3. Step 3: Cross multiply
    379,759.80x = 569,141.40 × 279,450.30
  4. Step 4: Simplify right side
    379,759.80x = 159,046,734,972.42
  5. Step 5: Solve for x
    x = 159,046,734,972.42/379,759.80
  6. Step 6: Final answer
    x = 418,808.77

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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.