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Finding the Fourth Proportional to 853.03, 1,279.74 and 414.49

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Solution

The fourth proportional to 853.03, 1,279.74 and 414.49 is: 621.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.03 : 1,279.74 = 414.49 : x
  2. Step 2: Convert to fraction form
    853.03/1,279.74 = 414.49/x
  3. Step 3: Cross multiply
    853.03x = 1,279.74 × 414.49
  4. Step 4: Simplify right side
    853.03x = 530,439.43
  5. Step 5: Solve for x
    x = 530,439.43/853.03
  6. Step 6: Final answer
    x = 621.83

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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.