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Finding the Fourth Proportional to 859.26, 1,286.46 and 570.12

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Solution

The fourth proportional to 859.26, 1,286.46 and 570.12 is: 853.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.26 : 1,286.46 = 570.12 : x
  2. Step 2: Convert to fraction form
    859.26/1,286.46 = 570.12/x
  3. Step 3: Cross multiply
    859.26x = 1,286.46 × 570.12
  4. Step 4: Simplify right side
    859.26x = 733,436.58
  5. Step 5: Solve for x
    x = 733,436.58/859.26
  6. Step 6: Final answer
    x = 853.57

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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.