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Finding the Fourth Proportional to 403.53, 556.91 and 226.51

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Solution

The fourth proportional to 403.53, 556.91 and 226.51 is: 312.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.53 : 556.91 = 226.51 : x
  2. Step 2: Convert to fraction form
    403.53/556.91 = 226.51/x
  3. Step 3: Cross multiply
    403.53x = 556.91 × 226.51
  4. Step 4: Simplify right side
    403.53x = 126,145.68
  5. Step 5: Solve for x
    x = 126,145.68/403.53
  6. Step 6: Final answer
    x = 312.61

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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.