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Finding the Fourth Proportional to 1,183.87, 1,633.80 and 659.89

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Solution

The fourth proportional to 1,183.87, 1,633.80 and 659.89 is: 910.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.87 : 1,633.80 = 659.89 : x
  2. Step 2: Convert to fraction form
    1,183.87/1,633.80 = 659.89/x
  3. Step 3: Cross multiply
    1,183.87x = 1,633.80 × 659.89
  4. Step 4: Simplify right side
    1,183.87x = 1,078,128.28
  5. Step 5: Solve for x
    x = 1,078,128.28/1,183.87
  6. Step 6: Final answer
    x = 910.68

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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.