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Finding the Fourth Proportional to 227.43, 313.64 and 148.72

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Solution

The fourth proportional to 227.43, 313.64 and 148.72 is: 205.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.43 : 313.64 = 148.72 : x
  2. Step 2: Convert to fraction form
    227.43/313.64 = 148.72/x
  3. Step 3: Cross multiply
    227.43x = 313.64 × 148.72
  4. Step 4: Simplify right side
    227.43x = 46,645.80
  5. Step 5: Solve for x
    x = 46,645.80/227.43
  6. Step 6: Final answer
    x = 205.10

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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.