Home / 2,131.39-3,197.09-670.69

Finding the Fourth Proportional to 2,131.39, 3,197.09 and 670.69

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Solution

The fourth proportional to 2,131.39, 3,197.09 and 670.69 is: 1,006.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.39 : 3,197.09 = 670.69 : x
  2. Step 2: Convert to fraction form
    2,131.39/3,197.09 = 670.69/x
  3. Step 3: Cross multiply
    2,131.39x = 3,197.09 × 670.69
  4. Step 4: Simplify right side
    2,131.39x = 2,144,252.94
  5. Step 5: Solve for x
    x = 2,144,252.94/2,131.39
  6. Step 6: Final answer
    x = 1,006.04

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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.