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Finding the Fourth Proportional to 282.15, 389.39 and 188.96

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Solution

The fourth proportional to 282.15, 389.39 and 188.96 is: 260.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.15 : 389.39 = 188.96 : x
  2. Step 2: Convert to fraction form
    282.15/389.39 = 188.96/x
  3. Step 3: Cross multiply
    282.15x = 389.39 × 188.96
  4. Step 4: Simplify right side
    282.15x = 73,576.24
  5. Step 5: Solve for x
    x = 73,576.24/282.15
  6. Step 6: Final answer
    x = 260.77

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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.