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Finding the Fourth Proportional to 636,464.44, 878,290.86 and 349,996.60

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Solution

The fourth proportional to 636,464.44, 878,290.86 and 349,996.60 is: 482,978.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,464.44 : 878,290.86 = 349,996.60 : x
  2. Step 2: Convert to fraction form
    636,464.44/878,290.86 = 349,996.60/x
  3. Step 3: Cross multiply
    636,464.44x = 878,290.86 × 349,996.60
  4. Step 4: Simplify right side
    636,464.44x = 307,398,814,811.08
  5. Step 5: Solve for x
    x = 307,398,814,811.08/636,464.44
  6. Step 6: Final answer
    x = 482,978.77

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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.