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Finding the Fourth Proportional to 225.74, 312.26 and 188.83

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Solution

The fourth proportional to 225.74, 312.26 and 188.83 is: 261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.74 : 312.26 = 188.83 : x
  2. Step 2: Convert to fraction form
    225.74/312.26 = 188.83/x
  3. Step 3: Cross multiply
    225.74x = 312.26 × 188.83
  4. Step 4: Simplify right side
    225.74x = 58,963.50
  5. Step 5: Solve for x
    x = 58,963.50/225.74
  6. Step 6: Final answer
    x = 261.20

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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.