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Finding the Fourth Proportional to 636,388, 878,192.96 and 349,906.08

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Solution

The fourth proportional to 636,388, 878,192.96 and 349,906.08 is: 482,858.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,388 : 878,192.96 = 349,906.08 : x
  2. Step 2: Convert to fraction form
    636,388/878,192.96 = 349,906.08/x
  3. Step 3: Cross multiply
    636,388x = 878,192.96 × 349,906.08
  4. Step 4: Simplify right side
    636,388x = 307,285,056,117.20
  5. Step 5: Solve for x
    x = 307,285,056,117.20/636,388
  6. Step 6: Final answer
    x = 482,858.03

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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.