Home / 3,455.12-5,183.49-989.87

Finding the Fourth Proportional to 3,455.12, 5,183.49 and 989.87

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Solution

The fourth proportional to 3,455.12, 5,183.49 and 989.87 is: 1,485.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455.12 : 5,183.49 = 989.87 : x
  2. Step 2: Convert to fraction form
    3,455.12/5,183.49 = 989.87/x
  3. Step 3: Cross multiply
    3,455.12x = 5,183.49 × 989.87
  4. Step 4: Simplify right side
    3,455.12x = 5,130,981.25
  5. Step 5: Solve for x
    x = 5,130,981.25/3,455.12
  6. Step 6: Final answer
    x = 1,485.04

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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.