Home / 2,101.16-3,151.74-640.28

Finding the Fourth Proportional to 2,101.16, 3,151.74 and 640.28

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Solution

The fourth proportional to 2,101.16, 3,151.74 and 640.28 is: 960.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.16 : 3,151.74 = 640.28 : x
  2. Step 2: Convert to fraction form
    2,101.16/3,151.74 = 640.28/x
  3. Step 3: Cross multiply
    2,101.16x = 3,151.74 × 640.28
  4. Step 4: Simplify right side
    2,101.16x = 2,017,996.09
  5. Step 5: Solve for x
    x = 2,017,996.09/2,101.16
  6. Step 6: Final answer
    x = 960.42

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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.