Home / 2,122.48-3,181.86-1,147.48

Finding the Fourth Proportional to 2,122.48, 3,181.86 and 1,147.48

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Solution

The fourth proportional to 2,122.48, 3,181.86 and 1,147.48 is: 1,720.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.48 : 3,181.86 = 1,147.48 : x
  2. Step 2: Convert to fraction form
    2,122.48/3,181.86 = 1,147.48/x
  3. Step 3: Cross multiply
    2,122.48x = 3,181.86 × 1,147.48
  4. Step 4: Simplify right side
    2,122.48x = 3,651,120.71
  5. Step 5: Solve for x
    x = 3,651,120.71/2,122.48
  6. Step 6: Final answer
    x = 1,720.21

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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.