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Finding the Fourth Proportional to 636,893.79, 878,540.16 and 407,367.33

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Solution

The fourth proportional to 636,893.79, 878,540.16 and 407,367.33 is: 561,928.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,893.79 : 878,540.16 = 407,367.33 : x
  2. Step 2: Convert to fraction form
    636,893.79/878,540.16 = 407,367.33/x
  3. Step 3: Cross multiply
    636,893.79x = 878,540.16 × 407,367.33
  4. Step 4: Simplify right side
    636,893.79x = 357,888,559,276.97
  5. Step 5: Solve for x
    x = 357,888,559,276.97/636,893.79
  6. Step 6: Final answer
    x = 561,928.17

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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.