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Finding the Fourth Proportional to 1,183.88, 1,775.68 and 318.26

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Solution

The fourth proportional to 1,183.88, 1,775.68 and 318.26 is: 477.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.88 : 1,775.68 = 318.26 : x
  2. Step 2: Convert to fraction form
    1,183.88/1,775.68 = 318.26/x
  3. Step 3: Cross multiply
    1,183.88x = 1,775.68 × 318.26
  4. Step 4: Simplify right side
    1,183.88x = 565,127.92
  5. Step 5: Solve for x
    x = 565,127.92/1,183.88
  6. Step 6: Final answer
    x = 477.35

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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.