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Finding the Fourth Proportional to 1,179.14, 1,769.45 and 659.48

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Solution

The fourth proportional to 1,179.14, 1,769.45 and 659.48 is: 989.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.14 : 1,769.45 = 659.48 : x
  2. Step 2: Convert to fraction form
    1,179.14/1,769.45 = 659.48/x
  3. Step 3: Cross multiply
    1,179.14x = 1,769.45 × 659.48
  4. Step 4: Simplify right side
    1,179.14x = 1,166,922.96
  5. Step 5: Solve for x
    x = 1,166,922.96/1,179.14
  6. Step 6: Final answer
    x = 989.64

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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.