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Finding the Fourth Proportional to 636,441.85, 878,071.20 and 394,637.41

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Solution

The fourth proportional to 636,441.85, 878,071.20 and 394,637.41 is: 544,464.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,441.85 : 878,071.20 = 394,637.41 : x
  2. Step 2: Convert to fraction form
    636,441.85/878,071.20 = 394,637.41/x
  3. Step 3: Cross multiply
    636,441.85x = 878,071.20 × 394,637.41
  4. Step 4: Simplify right side
    636,441.85x = 346,519,744,163.59
  5. Step 5: Solve for x
    x = 346,519,744,163.59/636,441.85
  6. Step 6: Final answer
    x = 544,464.11

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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.