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Finding the Fourth Proportional to 403.94, 557.42 and 238.25

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Solution

The fourth proportional to 403.94, 557.42 and 238.25 is: 328.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.94 : 557.42 = 238.25 : x
  2. Step 2: Convert to fraction form
    403.94/557.42 = 238.25/x
  3. Step 3: Cross multiply
    403.94x = 557.42 × 238.25
  4. Step 4: Simplify right side
    403.94x = 132,801.34
  5. Step 5: Solve for x
    x = 132,801.34/403.94
  6. Step 6: Final answer
    x = 328.77

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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.