Home / 2,155.68-3,234-1,181.28

Finding the Fourth Proportional to 2,155.68, 3,234 and 1,181.28

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Solution

The fourth proportional to 2,155.68, 3,234 and 1,181.28 is: 1,772.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.68 : 3,234 = 1,181.28 : x
  2. Step 2: Convert to fraction form
    2,155.68/3,234 = 1,181.28/x
  3. Step 3: Cross multiply
    2,155.68x = 3,234 × 1,181.28
  4. Step 4: Simplify right side
    2,155.68x = 3,820,259.52
  5. Step 5: Solve for x
    x = 3,820,259.52/2,155.68
  6. Step 6: Final answer
    x = 1,772.18

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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.