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Finding the Fourth Proportional to 636,628.37, 878,910.39 and 422,059.02

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Solution

The fourth proportional to 636,628.37, 878,910.39 and 422,059.02 is: 582,682.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,628.37 : 878,910.39 = 422,059.02 : x
  2. Step 2: Convert to fraction form
    636,628.37/878,910.39 = 422,059.02/x
  3. Step 3: Cross multiply
    636,628.37x = 878,910.39 × 422,059.02
  4. Step 4: Simplify right side
    636,628.37x = 370,952,057,871.22
  5. Step 5: Solve for x
    x = 370,952,057,871.22/636,628.37
  6. Step 6: Final answer
    x = 582,682.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.