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Finding the Fourth Proportional to 1,183.96, 1,775.94 and 318.25

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Solution

The fourth proportional to 1,183.96, 1,775.94 and 318.25 is: 477.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.96 : 1,775.94 = 318.25 : x
  2. Step 2: Convert to fraction form
    1,183.96/1,775.94 = 318.25/x
  3. Step 3: Cross multiply
    1,183.96x = 1,775.94 × 318.25
  4. Step 4: Simplify right side
    1,183.96x = 565,192.91
  5. Step 5: Solve for x
    x = 565,192.91/1,183.96
  6. Step 6: Final answer
    x = 477.38

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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.