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Finding the Fourth Proportional to 403.14, 556.11 and 245.72

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Solution

The fourth proportional to 403.14, 556.11 and 245.72 is: 338.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.14 : 556.11 = 245.72 : x
  2. Step 2: Convert to fraction form
    403.14/556.11 = 245.72/x
  3. Step 3: Cross multiply
    403.14x = 556.11 × 245.72
  4. Step 4: Simplify right side
    403.14x = 136,648.74
  5. Step 5: Solve for x
    x = 136,648.74/403.14
  6. Step 6: Final answer
    x = 338.96

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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.