Home / 2,130.29-3,190.57-1,262.78

Finding the Fourth Proportional to 2,130.29, 3,190.57 and 1,262.78

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Solution

The fourth proportional to 2,130.29, 3,190.57 and 1,262.78 is: 1,891.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.29 : 3,190.57 = 1,262.78 : x
  2. Step 2: Convert to fraction form
    2,130.29/3,190.57 = 1,262.78/x
  3. Step 3: Cross multiply
    2,130.29x = 3,190.57 × 1,262.78
  4. Step 4: Simplify right side
    2,130.29x = 4,028,987.98
  5. Step 5: Solve for x
    x = 4,028,987.98/2,130.29
  6. Step 6: Final answer
    x = 1,891.29

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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.