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Finding the Fourth Proportional to 833.94, 1,251.23 and 286.29

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Solution

The fourth proportional to 833.94, 1,251.23 and 286.29 is: 429.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.94 : 1,251.23 = 286.29 : x
  2. Step 2: Convert to fraction form
    833.94/1,251.23 = 286.29/x
  3. Step 3: Cross multiply
    833.94x = 1,251.23 × 286.29
  4. Step 4: Simplify right side
    833.94x = 358,213.21
  5. Step 5: Solve for x
    x = 358,213.21/833.94
  6. Step 6: Final answer
    x = 429.54

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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.