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Finding the Fourth Proportional to 282.25, 389.31 and 188.95

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Solution

The fourth proportional to 282.25, 389.31 and 188.95 is: 260.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.25 : 389.31 = 188.95 : x
  2. Step 2: Convert to fraction form
    282.25/389.31 = 188.95/x
  3. Step 3: Cross multiply
    282.25x = 389.31 × 188.95
  4. Step 4: Simplify right side
    282.25x = 73,560.12
  5. Step 5: Solve for x
    x = 73,560.12/282.25
  6. Step 6: Final answer
    x = 260.62

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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.