Home / 2,125.82-3,190.53-828.20

Finding the Fourth Proportional to 2,125.82, 3,190.53 and 828.20

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Solution

The fourth proportional to 2,125.82, 3,190.53 and 828.20 is: 1,243.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.82 : 3,190.53 = 828.20 : x
  2. Step 2: Convert to fraction form
    2,125.82/3,190.53 = 828.20/x
  3. Step 3: Cross multiply
    2,125.82x = 3,190.53 × 828.20
  4. Step 4: Simplify right side
    2,125.82x = 2,642,380.99
  5. Step 5: Solve for x
    x = 2,642,380.99/2,125.82
  6. Step 6: Final answer
    x = 1,243.00

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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.