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Finding the Fourth Proportional to 1,183.88, 1,775.28 and 636.32

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Solution

The fourth proportional to 1,183.88, 1,775.28 and 636.32 is: 954.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.88 : 1,775.28 = 636.32 : x
  2. Step 2: Convert to fraction form
    1,183.88/1,775.28 = 636.32/x
  3. Step 3: Cross multiply
    1,183.88x = 1,775.28 × 636.32
  4. Step 4: Simplify right side
    1,183.88x = 1,129,652.99
  5. Step 5: Solve for x
    x = 1,129,652.99/1,183.88
  6. Step 6: Final answer
    x = 954.19

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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.