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Finding the Fourth Proportional to 227.63, 314.12 and 129.39

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Solution

The fourth proportional to 227.63, 314.12 and 129.39 is: 178.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.63 : 314.12 = 129.39 : x
  2. Step 2: Convert to fraction form
    227.63/314.12 = 129.39/x
  3. Step 3: Cross multiply
    227.63x = 314.12 × 129.39
  4. Step 4: Simplify right side
    227.63x = 40,643.99
  5. Step 5: Solve for x
    x = 40,643.99/227.63
  6. Step 6: Final answer
    x = 178.55

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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.