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Finding the Fourth Proportional to 282.97, 389.64 and 282.16

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Solution

The fourth proportional to 282.97, 389.64 and 282.16 is: 388.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.97 : 389.64 = 282.16 : x
  2. Step 2: Convert to fraction form
    282.97/389.64 = 282.16/x
  3. Step 3: Cross multiply
    282.97x = 389.64 × 282.16
  4. Step 4: Simplify right side
    282.97x = 109,940.82
  5. Step 5: Solve for x
    x = 109,940.82/282.97
  6. Step 6: Final answer
    x = 388.52

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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.