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Finding the Fourth Proportional to 853.43, 1,279.71 and 333.03

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Solution

The fourth proportional to 853.43, 1,279.71 and 333.03 is: 499.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.43 : 1,279.71 = 333.03 : x
  2. Step 2: Convert to fraction form
    853.43/1,279.71 = 333.03/x
  3. Step 3: Cross multiply
    853.43x = 1,279.71 × 333.03
  4. Step 4: Simplify right side
    853.43x = 426,177.02
  5. Step 5: Solve for x
    x = 426,177.02/853.43
  6. Step 6: Final answer
    x = 499.37

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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.