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Finding the Fourth Proportional to 279,079.80, 418,619.70 and 255,460.20

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Solution

The fourth proportional to 279,079.80, 418,619.70 and 255,460.20 is: 383,190.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,079.80 : 418,619.70 = 255,460.20 : x
  2. Step 2: Convert to fraction form
    279,079.80/418,619.70 = 255,460.20/x
  3. Step 3: Cross multiply
    279,079.80x = 418,619.70 × 255,460.20
  4. Step 4: Simplify right side
    279,079.80x = 106,940,672,285.94
  5. Step 5: Solve for x
    x = 106,940,672,285.94/279,079.80
  6. Step 6: Final answer
    x = 383,190.30

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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.