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Finding the Fourth Proportional to 282.28, 389.40 and 188.92

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Solution

The fourth proportional to 282.28, 389.40 and 188.92 is: 260.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.28 : 389.40 = 188.92 : x
  2. Step 2: Convert to fraction form
    282.28/389.40 = 188.92/x
  3. Step 3: Cross multiply
    282.28x = 389.40 × 188.92
  4. Step 4: Simplify right side
    282.28x = 73,565.45
  5. Step 5: Solve for x
    x = 73,565.45/282.28
  6. Step 6: Final answer
    x = 260.61

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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.