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Finding the Fourth Proportional to 482.17, 664.86 and 388.63

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Solution

The fourth proportional to 482.17, 664.86 and 388.63 is: 535.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.17 : 664.86 = 388.63 : x
  2. Step 2: Convert to fraction form
    482.17/664.86 = 388.63/x
  3. Step 3: Cross multiply
    482.17x = 664.86 × 388.63
  4. Step 4: Simplify right side
    482.17x = 258,384.54
  5. Step 5: Solve for x
    x = 258,384.54/482.17
  6. Step 6: Final answer
    x = 535.88

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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.