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Finding the Fourth Proportional to 388.09, 579.11 and 353.59

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Solution

The fourth proportional to 388.09, 579.11 and 353.59 is: 527.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.09 : 579.11 = 353.59 : x
  2. Step 2: Convert to fraction form
    388.09/579.11 = 353.59/x
  3. Step 3: Cross multiply
    388.09x = 579.11 × 353.59
  4. Step 4: Simplify right side
    388.09x = 204,767.50
  5. Step 5: Solve for x
    x = 204,767.50/388.09
  6. Step 6: Final answer
    x = 527.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.