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Finding the Fourth Proportional to 636,392.28, 878,224.56 and 349,930.80

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Solution

The fourth proportional to 636,392.28, 878,224.56 and 349,930.80 is: 482,906.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,392.28 : 878,224.56 = 349,930.80 : x
  2. Step 2: Convert to fraction form
    636,392.28/878,224.56 = 349,930.80/x
  3. Step 3: Cross multiply
    636,392.28x = 878,224.56 × 349,930.80
  4. Step 4: Simplify right side
    636,392.28x = 307,317,822,860.45
  5. Step 5: Solve for x
    x = 307,317,822,860.45/636,392.28
  6. Step 6: Final answer
    x = 482,906.27

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1.5x scale

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.