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Finding the Fourth Proportional to 3,183.80, 4,775.12 and 875.28

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Solution

The fourth proportional to 3,183.80, 4,775.12 and 875.28 is: 1,312.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,183.80 : 4,775.12 = 875.28 : x
  2. Step 2: Convert to fraction form
    3,183.80/4,775.12 = 875.28/x
  3. Step 3: Cross multiply
    3,183.80x = 4,775.12 × 875.28
  4. Step 4: Simplify right side
    3,183.80x = 4,179,567.03
  5. Step 5: Solve for x
    x = 4,179,567.03/3,183.80
  6. Step 6: Final answer
    x = 1,312.76

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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.