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Finding the Fourth Proportional to 836.45, 1,252.35 and 630.39

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Solution

The fourth proportional to 836.45, 1,252.35 and 630.39 is: 943.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.45 : 1,252.35 = 630.39 : x
  2. Step 2: Convert to fraction form
    836.45/1,252.35 = 630.39/x
  3. Step 3: Cross multiply
    836.45x = 1,252.35 × 630.39
  4. Step 4: Simplify right side
    836.45x = 789,468.92
  5. Step 5: Solve for x
    x = 789,468.92/836.45
  6. Step 6: Final answer
    x = 943.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.