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Finding the Fourth Proportional to 3,122.72, 4,308 and 1,880

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Solution

The fourth proportional to 3,122.72, 4,308 and 1,880 is: 2,593.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.72 : 4,308 = 1,880 : x
  2. Step 2: Convert to fraction form
    3,122.72/4,308 = 1,880/x
  3. Step 3: Cross multiply
    3,122.72x = 4,308 × 1,880
  4. Step 4: Simplify right side
    3,122.72x = 8,099,040
  5. Step 5: Solve for x
    x = 8,099,040/3,122.72
  6. Step 6: Final answer
    x = 2,593.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.