Home / 2,129.21-3,189.17-1,031.25

Finding the Fourth Proportional to 2,129.21, 3,189.17 and 1,031.25

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Solution

The fourth proportional to 2,129.21, 3,189.17 and 1,031.25 is: 1,544.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.21 : 3,189.17 = 1,031.25 : x
  2. Step 2: Convert to fraction form
    2,129.21/3,189.17 = 1,031.25/x
  3. Step 3: Cross multiply
    2,129.21x = 3,189.17 × 1,031.25
  4. Step 4: Simplify right side
    2,129.21x = 3,288,834.14
  5. Step 5: Solve for x
    x = 3,288,834.14/2,129.21
  6. Step 6: Final answer
    x = 1,544.63

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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.