Home / 3,418.98-5,128.46-2,640.12

Finding the Fourth Proportional to 3,418.98, 5,128.46 and 2,640.12

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Solution

The fourth proportional to 3,418.98, 5,128.46 and 2,640.12 is: 3,960.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,418.98 : 5,128.46 = 2,640.12 : x
  2. Step 2: Convert to fraction form
    3,418.98/5,128.46 = 2,640.12/x
  3. Step 3: Cross multiply
    3,418.98x = 5,128.46 × 2,640.12
  4. Step 4: Simplify right side
    3,418.98x = 13,539,749.82
  5. Step 5: Solve for x
    x = 13,539,749.82/3,418.98
  6. Step 6: Final answer
    x = 3,960.17

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1.5x scale

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.