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Finding the Fourth Proportional to 447,059.80, 670,589.70 and 279,098.20

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Solution

The fourth proportional to 447,059.80, 670,589.70 and 279,098.20 is: 418,647.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,059.80 : 670,589.70 = 279,098.20 : x
  2. Step 2: Convert to fraction form
    447,059.80/670,589.70 = 279,098.20/x
  3. Step 3: Cross multiply
    447,059.80x = 670,589.70 × 279,098.20
  4. Step 4: Simplify right side
    447,059.80x = 187,160,378,208.54
  5. Step 5: Solve for x
    x = 187,160,378,208.54/447,059.80
  6. Step 6: Final answer
    x = 418,647.30

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Similar ratio
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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.