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Finding the Fourth Proportional to 227.21, 313.57 and 129.00

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Solution

The fourth proportional to 227.21, 313.57 and 129.00 is: 178.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.21 : 313.57 = 129.00 : x
  2. Step 2: Convert to fraction form
    227.21/313.57 = 129.00/x
  3. Step 3: Cross multiply
    227.21x = 313.57 × 129.00
  4. Step 4: Simplify right side
    227.21x = 40,450.10
  5. Step 5: Solve for x
    x = 40,450.10/227.21
  6. Step 6: Final answer
    x = 178.03

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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.