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Finding the Fourth Proportional to 839.32, 1,257.94 and 633.23

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Solution

The fourth proportional to 839.32, 1,257.94 and 633.23 is: 949.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.32 : 1,257.94 = 633.23 : x
  2. Step 2: Convert to fraction form
    839.32/1,257.94 = 633.23/x
  3. Step 3: Cross multiply
    839.32x = 1,257.94 × 633.23
  4. Step 4: Simplify right side
    839.32x = 796,565.35
  5. Step 5: Solve for x
    x = 796,565.35/839.32
  6. Step 6: Final answer
    x = 949.06

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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.