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Finding the Fourth Proportional to 636,813.45, 878,780.39 and 350,330.49

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Solution

The fourth proportional to 636,813.45, 878,780.39 and 350,330.49 is: 483,443.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,813.45 : 878,780.39 = 350,330.49 : x
  2. Step 2: Convert to fraction form
    636,813.45/878,780.39 = 350,330.49/x
  3. Step 3: Cross multiply
    636,813.45x = 878,780.39 × 350,330.49
  4. Step 4: Simplify right side
    636,813.45x = 307,863,562,879.44
  5. Step 5: Solve for x
    x = 307,863,562,879.44/636,813.45
  6. Step 6: Final answer
    x = 483,443.88

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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.