Home / 2,131.05-3,196.57-976.80

Finding the Fourth Proportional to 2,131.05, 3,196.57 and 976.80

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Solution

The fourth proportional to 2,131.05, 3,196.57 and 976.80 is: 1,465.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.05 : 3,196.57 = 976.80 : x
  2. Step 2: Convert to fraction form
    2,131.05/3,196.57 = 976.80/x
  3. Step 3: Cross multiply
    2,131.05x = 3,196.57 × 976.80
  4. Step 4: Simplify right side
    2,131.05x = 3,122,393.59
  5. Step 5: Solve for x
    x = 3,122,393.59/2,131.05
  6. Step 6: Final answer
    x = 1,465.19

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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.