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Finding the Fourth Proportional to 1,183.48, 1,775.16 and 317.80

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Solution

The fourth proportional to 1,183.48, 1,775.16 and 317.80 is: 476.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.48 : 1,775.16 = 317.80 : x
  2. Step 2: Convert to fraction form
    1,183.48/1,775.16 = 317.80/x
  3. Step 3: Cross multiply
    1,183.48x = 1,775.16 × 317.80
  4. Step 4: Simplify right side
    1,183.48x = 564,145.85
  5. Step 5: Solve for x
    x = 564,145.85/1,183.48
  6. Step 6: Final answer
    x = 476.68

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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.