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Finding the Fourth Proportional to 404.68, 558.45 and 238.99

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Solution

The fourth proportional to 404.68, 558.45 and 238.99 is: 329.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.68 : 558.45 = 238.99 : x
  2. Step 2: Convert to fraction form
    404.68/558.45 = 238.99/x
  3. Step 3: Cross multiply
    404.68x = 558.45 × 238.99
  4. Step 4: Simplify right side
    404.68x = 133,463.97
  5. Step 5: Solve for x
    x = 133,463.97/404.68
  6. Step 6: Final answer
    x = 329.80

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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.