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Finding the Fourth Proportional to 254.39, 350.64 and 212.72

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Solution

The fourth proportional to 254.39, 350.64 and 212.72 is: 293.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.39 : 350.64 = 212.72 : x
  2. Step 2: Convert to fraction form
    254.39/350.64 = 212.72/x
  3. Step 3: Cross multiply
    254.39x = 350.64 × 212.72
  4. Step 4: Simplify right side
    254.39x = 74,586.39
  5. Step 5: Solve for x
    x = 74,586.39/254.39
  6. Step 6: Final answer
    x = 293.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.