Home / 3,512.72-5,265-1,320.05

Finding the Fourth Proportional to 3,512.72, 5,265 and 1,320.05

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Solution

The fourth proportional to 3,512.72, 5,265 and 1,320.05 is: 1,978.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,512.72 : 5,265 = 1,320.05 : x
  2. Step 2: Convert to fraction form
    3,512.72/5,265 = 1,320.05/x
  3. Step 3: Cross multiply
    3,512.72x = 5,265 × 1,320.05
  4. Step 4: Simplify right side
    3,512.72x = 6,950,063.25
  5. Step 5: Solve for x
    x = 6,950,063.25/3,512.72
  6. Step 6: Final answer
    x = 1,978.54

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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.