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Finding the Fourth Proportional to 282.60, 389.68 and 189.36

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Solution

The fourth proportional to 282.60, 389.68 and 189.36 is: 261.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.60 : 389.68 = 189.36 : x
  2. Step 2: Convert to fraction form
    282.60/389.68 = 189.36/x
  3. Step 3: Cross multiply
    282.60x = 389.68 × 189.36
  4. Step 4: Simplify right side
    282.60x = 73,789.80
  5. Step 5: Solve for x
    x = 73,789.80/282.60
  6. Step 6: Final answer
    x = 261.11

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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.