Home / 2,772.19-3,820.34-1,984.87

Finding the Fourth Proportional to 2,772.19, 3,820.34 and 1,984.87

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Solution

The fourth proportional to 2,772.19, 3,820.34 and 1,984.87 is: 2,735.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,772.19 : 3,820.34 = 1,984.87 : x
  2. Step 2: Convert to fraction form
    2,772.19/3,820.34 = 1,984.87/x
  3. Step 3: Cross multiply
    2,772.19x = 3,820.34 × 1,984.87
  4. Step 4: Simplify right side
    2,772.19x = 7,582,878.26
  5. Step 5: Solve for x
    x = 7,582,878.26/2,772.19
  6. Step 6: Final answer
    x = 2,735.34

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1.5x scale

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.