Home / 2,858.12-3,944.34-2,158.28

Finding the Fourth Proportional to 2,858.12, 3,944.34 and 2,158.28

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Solution

The fourth proportional to 2,858.12, 3,944.34 and 2,158.28 is: 2,978.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.12 : 3,944.34 = 2,158.28 : x
  2. Step 2: Convert to fraction form
    2,858.12/3,944.34 = 2,158.28/x
  3. Step 3: Cross multiply
    2,858.12x = 3,944.34 × 2,158.28
  4. Step 4: Simplify right side
    2,858.12x = 8,512,990.14
  5. Step 5: Solve for x
    x = 8,512,990.14/2,858.12
  6. Step 6: Final answer
    x = 2,978.53

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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.