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Finding the Fourth Proportional to 404.13, 557.72 and 238.30

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Solution

The fourth proportional to 404.13, 557.72 and 238.30 is: 328.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.13 : 557.72 = 238.30 : x
  2. Step 2: Convert to fraction form
    404.13/557.72 = 238.30/x
  3. Step 3: Cross multiply
    404.13x = 557.72 × 238.30
  4. Step 4: Simplify right side
    404.13x = 132,904.68
  5. Step 5: Solve for x
    x = 132,904.68/404.13
  6. Step 6: Final answer
    x = 328.87

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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.