Home / 3,620.81-5,431.57-1,155.04

Finding the Fourth Proportional to 3,620.81, 5,431.57 and 1,155.04

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Solution

The fourth proportional to 3,620.81, 5,431.57 and 1,155.04 is: 1,732.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.81 : 5,431.57 = 1,155.04 : x
  2. Step 2: Convert to fraction form
    3,620.81/5,431.57 = 1,155.04/x
  3. Step 3: Cross multiply
    3,620.81x = 5,431.57 × 1,155.04
  4. Step 4: Simplify right side
    3,620.81x = 6,273,664.15
  5. Step 5: Solve for x
    x = 6,273,664.15/3,620.81
  6. Step 6: Final answer
    x = 1,732.67

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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.