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Finding the Fourth Proportional to 834.12, 1,250.78 and 286.11

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Solution

The fourth proportional to 834.12, 1,250.78 and 286.11 is: 429.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.12 : 1,250.78 = 286.11 : x
  2. Step 2: Convert to fraction form
    834.12/1,250.78 = 286.11/x
  3. Step 3: Cross multiply
    834.12x = 1,250.78 × 286.11
  4. Step 4: Simplify right side
    834.12x = 357,859.24
  5. Step 5: Solve for x
    x = 357,859.24/834.12
  6. Step 6: Final answer
    x = 429.03

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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.