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Finding the Fourth Proportional to 388.62, 535.89 and 301.14

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Solution

The fourth proportional to 388.62, 535.89 and 301.14 is: 415.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.62 : 535.89 = 301.14 : x
  2. Step 2: Convert to fraction form
    388.62/535.89 = 301.14/x
  3. Step 3: Cross multiply
    388.62x = 535.89 × 301.14
  4. Step 4: Simplify right side
    388.62x = 161,377.91
  5. Step 5: Solve for x
    x = 161,377.91/388.62
  6. Step 6: Final answer
    x = 415.26

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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.