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Finding the Fourth Proportional to 426,465.44, 639,826 and 126,956.48

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Solution

The fourth proportional to 426,465.44, 639,826 and 126,956.48 is: 190,472.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,465.44 : 639,826 = 126,956.48 : x
  2. Step 2: Convert to fraction form
    426,465.44/639,826 = 126,956.48/x
  3. Step 3: Cross multiply
    426,465.44x = 639,826 × 126,956.48
  4. Step 4: Simplify right side
    426,465.44x = 81,230,056,772.48
  5. Step 5: Solve for x
    x = 81,230,056,772.48/426,465.44
  6. Step 6: Final answer
    x = 190,472.78

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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.