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Finding the Fourth Proportional to 224.83, 335.28 and 215.72

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Solution

The fourth proportional to 224.83, 335.28 and 215.72 is: 321.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.83 : 335.28 = 215.72 : x
  2. Step 2: Convert to fraction form
    224.83/335.28 = 215.72/x
  3. Step 3: Cross multiply
    224.83x = 335.28 × 215.72
  4. Step 4: Simplify right side
    224.83x = 72,326.60
  5. Step 5: Solve for x
    x = 72,326.60/224.83
  6. Step 6: Final answer
    x = 321.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.