Home / 2,781.21-4,173.68-1,320.48

Finding the Fourth Proportional to 2,781.21, 4,173.68 and 1,320.48

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Solution

The fourth proportional to 2,781.21, 4,173.68 and 1,320.48 is: 1,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.21 : 4,173.68 = 1,320.48 : x
  2. Step 2: Convert to fraction form
    2,781.21/4,173.68 = 1,320.48/x
  3. Step 3: Cross multiply
    2,781.21x = 4,173.68 × 1,320.48
  4. Step 4: Simplify right side
    2,781.21x = 5,511,245.10
  5. Step 5: Solve for x
    x = 5,511,245.10/2,781.21
  6. Step 6: Final answer
    x = 1,981.60

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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.