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Finding the Fourth Proportional to 709.22, 1,063.89 and 189.30

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Solution

The fourth proportional to 709.22, 1,063.89 and 189.30 is: 283.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.22 : 1,063.89 = 189.30 : x
  2. Step 2: Convert to fraction form
    709.22/1,063.89 = 189.30/x
  3. Step 3: Cross multiply
    709.22x = 1,063.89 × 189.30
  4. Step 4: Simplify right side
    709.22x = 201,394.38
  5. Step 5: Solve for x
    x = 201,394.38/709.22
  6. Step 6: Final answer
    x = 283.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.