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Finding the Fourth Proportional to 1,183.64, 1,631.94 and 889.88

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Solution

The fourth proportional to 1,183.64, 1,631.94 and 889.88 is: 1,226.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.64 : 1,631.94 = 889.88 : x
  2. Step 2: Convert to fraction form
    1,183.64/1,631.94 = 889.88/x
  3. Step 3: Cross multiply
    1,183.64x = 1,631.94 × 889.88
  4. Step 4: Simplify right side
    1,183.64x = 1,452,230.77
  5. Step 5: Solve for x
    x = 1,452,230.77/1,183.64
  6. Step 6: Final answer
    x = 1,226.92

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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.