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Finding the Fourth Proportional to 853.04, 1,279.89 and 333.09

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Solution

The fourth proportional to 853.04, 1,279.89 and 333.09 is: 499.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.04 : 1,279.89 = 333.09 : x
  2. Step 2: Convert to fraction form
    853.04/1,279.89 = 333.09/x
  3. Step 3: Cross multiply
    853.04x = 1,279.89 × 333.09
  4. Step 4: Simplify right side
    853.04x = 426,318.56
  5. Step 5: Solve for x
    x = 426,318.56/853.04
  6. Step 6: Final answer
    x = 499.76

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1.5x scale

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.