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Finding the Fourth Proportional to 833.92, 1,252.70 and 422.94

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Solution

The fourth proportional to 833.92, 1,252.70 and 422.94 is: 635.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.92 : 1,252.70 = 422.94 : x
  2. Step 2: Convert to fraction form
    833.92/1,252.70 = 422.94/x
  3. Step 3: Cross multiply
    833.92x = 1,252.70 × 422.94
  4. Step 4: Simplify right side
    833.92x = 529,816.94
  5. Step 5: Solve for x
    x = 529,816.94/833.92
  6. Step 6: Final answer
    x = 635.33

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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.