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Finding the Fourth Proportional to 426,411.74, 639,617.52 and 126,896.60

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Solution

The fourth proportional to 426,411.74, 639,617.52 and 126,896.60 is: 190,344.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,411.74 : 639,617.52 = 126,896.60 : x
  2. Step 2: Convert to fraction form
    426,411.74/639,617.52 = 126,896.60/x
  3. Step 3: Cross multiply
    426,411.74x = 639,617.52 × 126,896.60
  4. Step 4: Simplify right side
    426,411.74x = 81,165,288,588.43
  5. Step 5: Solve for x
    x = 81,165,288,588.43/426,411.74
  6. Step 6: Final answer
    x = 190,344.87

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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.