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Finding the Fourth Proportional to 853.13, 1,279.37 and 333.07

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Solution

The fourth proportional to 853.13, 1,279.37 and 333.07 is: 499.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.13 : 1,279.37 = 333.07 : x
  2. Step 2: Convert to fraction form
    853.13/1,279.37 = 333.07/x
  3. Step 3: Cross multiply
    853.13x = 1,279.37 × 333.07
  4. Step 4: Simplify right side
    853.13x = 426,111.70
  5. Step 5: Solve for x
    x = 426,111.70/853.13
  6. Step 6: Final answer
    x = 499.47

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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.