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Finding the Fourth Proportional to 853.24, 1,279.92 and 276.16

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Solution

The fourth proportional to 853.24, 1,279.92 and 276.16 is: 414.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.24 : 1,279.92 = 276.16 : x
  2. Step 2: Convert to fraction form
    853.24/1,279.92 = 276.16/x
  3. Step 3: Cross multiply
    853.24x = 1,279.92 × 276.16
  4. Step 4: Simplify right side
    853.24x = 353,462.71
  5. Step 5: Solve for x
    x = 353,462.71/853.24
  6. Step 6: Final answer
    x = 414.26

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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.