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Finding the Fourth Proportional to 833.60, 1,251.17 and 423.02

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Solution

The fourth proportional to 833.60, 1,251.17 and 423.02 is: 634.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.60 : 1,251.17 = 423.02 : x
  2. Step 2: Convert to fraction form
    833.60/1,251.17 = 423.02/x
  3. Step 3: Cross multiply
    833.60x = 1,251.17 × 423.02
  4. Step 4: Simplify right side
    833.60x = 529,269.93
  5. Step 5: Solve for x
    x = 529,269.93/833.60
  6. Step 6: Final answer
    x = 634.92

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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.