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Finding the Fourth Proportional to 636,278.40, 878,052 and 349,795.68

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Solution

The fourth proportional to 636,278.40, 878,052 and 349,795.68 is: 482,711.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,278.40 : 878,052 = 349,795.68 : x
  2. Step 2: Convert to fraction form
    636,278.40/878,052 = 349,795.68/x
  3. Step 3: Cross multiply
    636,278.40x = 878,052 × 349,795.68
  4. Step 4: Simplify right side
    636,278.40x = 307,138,796,415.36
  5. Step 5: Solve for x
    x = 307,138,796,415.36/636,278.40
  6. Step 6: Final answer
    x = 482,711.34

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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.