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Finding the Fourth Proportional to 403.25, 556.24 and 245.81

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Solution

The fourth proportional to 403.25, 556.24 and 245.81 is: 339.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.25 : 556.24 = 245.81 : x
  2. Step 2: Convert to fraction form
    403.25/556.24 = 245.81/x
  3. Step 3: Cross multiply
    403.25x = 556.24 × 245.81
  4. Step 4: Simplify right side
    403.25x = 136,725.34
  5. Step 5: Solve for x
    x = 136,725.34/403.25
  6. Step 6: Final answer
    x = 339.06

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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.