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Finding the Fourth Proportional to 636,631.20, 878,256.54 and 381,539.52

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Solution

The fourth proportional to 636,631.20, 878,256.54 and 381,539.52 is: 526,348.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,631.20 : 878,256.54 = 381,539.52 : x
  2. Step 2: Convert to fraction form
    636,631.20/878,256.54 = 381,539.52/x
  3. Step 3: Cross multiply
    636,631.20x = 878,256.54 × 381,539.52
  4. Step 4: Simplify right side
    636,631.20x = 335,089,578,708.46
  5. Step 5: Solve for x
    x = 335,089,578,708.46/636,631.20
  6. Step 6: Final answer
    x = 526,348.03

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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.