Home / 3,611.24-5,415-1,661.75

Finding the Fourth Proportional to 3,611.24, 5,415 and 1,661.75

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Solution

The fourth proportional to 3,611.24, 5,415 and 1,661.75 is: 2,491.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.24 : 5,415 = 1,661.75 : x
  2. Step 2: Convert to fraction form
    3,611.24/5,415 = 1,661.75/x
  3. Step 3: Cross multiply
    3,611.24x = 5,415 × 1,661.75
  4. Step 4: Simplify right side
    3,611.24x = 8,998,376.25
  5. Step 5: Solve for x
    x = 8,998,376.25/3,611.24
  6. Step 6: Final answer
    x = 2,491.77

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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.