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Finding the Fourth Proportional to 388.36, 534.75 and 353.17

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Solution

The fourth proportional to 388.36, 534.75 and 353.17 is: 486.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.36 : 534.75 = 353.17 : x
  2. Step 2: Convert to fraction form
    388.36/534.75 = 353.17/x
  3. Step 3: Cross multiply
    388.36x = 534.75 × 353.17
  4. Step 4: Simplify right side
    388.36x = 188,857.66
  5. Step 5: Solve for x
    x = 188,857.66/388.36
  6. Step 6: Final answer
    x = 486.30

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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.