Home / 2,101.08-3,151.80-640.56

Finding the Fourth Proportional to 2,101.08, 3,151.80 and 640.56

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Solution

The fourth proportional to 2,101.08, 3,151.80 and 640.56 is: 960.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.08 : 3,151.80 = 640.56 : x
  2. Step 2: Convert to fraction form
    2,101.08/3,151.80 = 640.56/x
  3. Step 3: Cross multiply
    2,101.08x = 3,151.80 × 640.56
  4. Step 4: Simplify right side
    2,101.08x = 2,018,917.01
  5. Step 5: Solve for x
    x = 2,018,917.01/2,101.08
  6. Step 6: Final answer
    x = 960.89

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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.