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Finding the Fourth Proportional to 833.26, 1,248.33 and 422.38

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Solution

The fourth proportional to 833.26, 1,248.33 and 422.38 is: 632.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.26 : 1,248.33 = 422.38 : x
  2. Step 2: Convert to fraction form
    833.26/1,248.33 = 422.38/x
  3. Step 3: Cross multiply
    833.26x = 1,248.33 × 422.38
  4. Step 4: Simplify right side
    833.26x = 527,269.63
  5. Step 5: Solve for x
    x = 527,269.63/833.26
  6. Step 6: Final answer
    x = 632.78

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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.