Home / 3,157.44-4,358.62-1,978.26

Finding the Fourth Proportional to 3,157.44, 4,358.62 and 1,978.26

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Solution

The fourth proportional to 3,157.44, 4,358.62 and 1,978.26 is: 2,730.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,157.44 : 4,358.62 = 1,978.26 : x
  2. Step 2: Convert to fraction form
    3,157.44/4,358.62 = 1,978.26/x
  3. Step 3: Cross multiply
    3,157.44x = 4,358.62 × 1,978.26
  4. Step 4: Simplify right side
    3,157.44x = 8,622,483.60
  5. Step 5: Solve for x
    x = 8,622,483.60/3,157.44
  6. Step 6: Final answer
    x = 2,730.85

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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.