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Finding the Fourth Proportional to 249.39, 372.51 and 212.94

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Solution

The fourth proportional to 249.39, 372.51 and 212.94 is: 318.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.39 : 372.51 = 212.94 : x
  2. Step 2: Convert to fraction form
    249.39/372.51 = 212.94/x
  3. Step 3: Cross multiply
    249.39x = 372.51 × 212.94
  4. Step 4: Simplify right side
    249.39x = 79,322.28
  5. Step 5: Solve for x
    x = 79,322.28/249.39
  6. Step 6: Final answer
    x = 318.07

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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.