Home / 2,101.23-3,151.98-640.26

Finding the Fourth Proportional to 2,101.23, 3,151.98 and 640.26

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Solution

The fourth proportional to 2,101.23, 3,151.98 and 640.26 is: 960.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.23 : 3,151.98 = 640.26 : x
  2. Step 2: Convert to fraction form
    2,101.23/3,151.98 = 640.26/x
  3. Step 3: Cross multiply
    2,101.23x = 3,151.98 × 640.26
  4. Step 4: Simplify right side
    2,101.23x = 2,018,086.71
  5. Step 5: Solve for x
    x = 2,018,086.71/2,101.23
  6. Step 6: Final answer
    x = 960.43

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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.