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Finding the Fourth Proportional to 247.62, 339.81 and 225.66

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Solution

The fourth proportional to 247.62, 339.81 and 225.66 is: 309.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.62 : 339.81 = 225.66 : x
  2. Step 2: Convert to fraction form
    247.62/339.81 = 225.66/x
  3. Step 3: Cross multiply
    247.62x = 339.81 × 225.66
  4. Step 4: Simplify right side
    247.62x = 76,681.52
  5. Step 5: Solve for x
    x = 76,681.52/247.62
  6. Step 6: Final answer
    x = 309.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.