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Finding the Fourth Proportional to 449,251.28, 669,789.82 and 398,764.40

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Solution

The fourth proportional to 449,251.28, 669,789.82 and 398,764.40 is: 594,518.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,251.28 : 669,789.82 = 398,764.40 : x
  2. Step 2: Convert to fraction form
    449,251.28/669,789.82 = 398,764.40/x
  3. Step 3: Cross multiply
    449,251.28x = 669,789.82 × 398,764.40
  4. Step 4: Simplify right side
    449,251.28x = 267,088,335,698.41
  5. Step 5: Solve for x
    x = 267,088,335,698.41/449,251.28
  6. Step 6: Final answer
    x = 594,518.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.