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Finding the Fourth Proportional to 225.64, 312.80 and 213.32

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Solution

The fourth proportional to 225.64, 312.80 and 213.32 is: 295.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.64 : 312.80 = 213.32 : x
  2. Step 2: Convert to fraction form
    225.64/312.80 = 213.32/x
  3. Step 3: Cross multiply
    225.64x = 312.80 × 213.32
  4. Step 4: Simplify right side
    225.64x = 66,727.81
  5. Step 5: Solve for x
    x = 66,727.81/225.64
  6. Step 6: Final answer
    x = 295.73

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.