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Finding the Fourth Proportional to 403.56, 557.02 and 248.44

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Solution

The fourth proportional to 403.56, 557.02 and 248.44 is: 342.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.56 : 557.02 = 248.44 : x
  2. Step 2: Convert to fraction form
    403.56/557.02 = 248.44/x
  3. Step 3: Cross multiply
    403.56x = 557.02 × 248.44
  4. Step 4: Simplify right side
    403.56x = 138,386.05
  5. Step 5: Solve for x
    x = 138,386.05/403.56
  6. Step 6: Final answer
    x = 342.91

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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.