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Finding the Fourth Proportional to 636,367.12, 878,186.70 and 349,906.60

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Solution

The fourth proportional to 636,367.12, 878,186.70 and 349,906.60 is: 482,871.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,367.12 : 878,186.70 = 349,906.60 : x
  2. Step 2: Convert to fraction form
    636,367.12/878,186.70 = 349,906.60/x
  3. Step 3: Cross multiply
    636,367.12x = 878,186.70 × 349,906.60
  4. Step 4: Simplify right side
    636,367.12x = 307,283,322,362.22
  5. Step 5: Solve for x
    x = 307,283,322,362.22/636,367.12
  6. Step 6: Final answer
    x = 482,871.15

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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.