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Finding the Fourth Proportional to 404.57, 558.36 and 238.82

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Solution

The fourth proportional to 404.57, 558.36 and 238.82 is: 329.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.57 : 558.36 = 238.82 : x
  2. Step 2: Convert to fraction form
    404.57/558.36 = 238.82/x
  3. Step 3: Cross multiply
    404.57x = 558.36 × 238.82
  4. Step 4: Simplify right side
    404.57x = 133,347.54
  5. Step 5: Solve for x
    x = 133,347.54/404.57
  6. Step 6: Final answer
    x = 329.60

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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.