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Finding the Fourth Proportional to 936.91, 1,292.34 and 622.27

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Solution

The fourth proportional to 936.91, 1,292.34 and 622.27 is: 858.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.91 : 1,292.34 = 622.27 : x
  2. Step 2: Convert to fraction form
    936.91/1,292.34 = 622.27/x
  3. Step 3: Cross multiply
    936.91x = 1,292.34 × 622.27
  4. Step 4: Simplify right side
    936.91x = 804,184.41
  5. Step 5: Solve for x
    x = 804,184.41/936.91
  6. Step 6: Final answer
    x = 858.34

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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.