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Finding the Fourth Proportional to 456.45, 684.63 and 225.49

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Solution

The fourth proportional to 456.45, 684.63 and 225.49 is: 338.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.45 : 684.63 = 225.49 : x
  2. Step 2: Convert to fraction form
    456.45/684.63 = 225.49/x
  3. Step 3: Cross multiply
    456.45x = 684.63 × 225.49
  4. Step 4: Simplify right side
    456.45x = 154,379.15
  5. Step 5: Solve for x
    x = 154,379.15/456.45
  6. Step 6: Final answer
    x = 338.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.