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Finding the Fourth Proportional to 636,323.66, 878,409.72 and 378,284.15

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Solution

The fourth proportional to 636,323.66, 878,409.72 and 378,284.15 is: 522,200.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,323.66 : 878,409.72 = 378,284.15 : x
  2. Step 2: Convert to fraction form
    636,323.66/878,409.72 = 378,284.15/x
  3. Step 3: Cross multiply
    636,323.66x = 878,409.72 × 378,284.15
  4. Step 4: Simplify right side
    636,323.66x = 332,288,469,889.89
  5. Step 5: Solve for x
    x = 332,288,469,889.89/636,323.66
  6. Step 6: Final answer
    x = 522,200.40

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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.