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Finding the Fourth Proportional to 403.01, 556.16 and 225.99

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Solution

The fourth proportional to 403.01, 556.16 and 225.99 is: 311.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.01 : 556.16 = 225.99 : x
  2. Step 2: Convert to fraction form
    403.01/556.16 = 225.99/x
  3. Step 3: Cross multiply
    403.01x = 556.16 × 225.99
  4. Step 4: Simplify right side
    403.01x = 125,682.69
  5. Step 5: Solve for x
    x = 125,682.69/403.01
  6. Step 6: Final answer
    x = 311.86

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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.