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Finding the Fourth Proportional to 301.63, 415.74 and 213.15

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Solution

The fourth proportional to 301.63, 415.74 and 213.15 is: 293.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.63 : 415.74 = 213.15 : x
  2. Step 2: Convert to fraction form
    301.63/415.74 = 213.15/x
  3. Step 3: Cross multiply
    301.63x = 415.74 × 213.15
  4. Step 4: Simplify right side
    301.63x = 88,614.98
  5. Step 5: Solve for x
    x = 88,614.98/301.63
  6. Step 6: Final answer
    x = 293.79

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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.