Home / 1,520.75-2,100.45-1,080.56

Finding the Fourth Proportional to 1,520.75, 2,100.45 and 1,080.56

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Solution

The fourth proportional to 1,520.75, 2,100.45 and 1,080.56 is: 1,492.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.75 : 2,100.45 = 1,080.56 : x
  2. Step 2: Convert to fraction form
    1,520.75/2,100.45 = 1,080.56/x
  3. Step 3: Cross multiply
    1,520.75x = 2,100.45 × 1,080.56
  4. Step 4: Simplify right side
    1,520.75x = 2,269,651.75
  5. Step 5: Solve for x
    x = 2,269,651.75/1,520.75
  6. Step 6: Final answer
    x = 1,492.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.