Home / 3,746.60-5,620.40-1,280.80

Finding the Fourth Proportional to 3,746.60, 5,620.40 and 1,280.80

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Solution

The fourth proportional to 3,746.60, 5,620.40 and 1,280.80 is: 1,921.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,746.60 : 5,620.40 = 1,280.80 : x
  2. Step 2: Convert to fraction form
    3,746.60/5,620.40 = 1,280.80/x
  3. Step 3: Cross multiply
    3,746.60x = 5,620.40 × 1,280.80
  4. Step 4: Simplify right side
    3,746.60x = 7,198,608.32
  5. Step 5: Solve for x
    x = 7,198,608.32/3,746.60
  6. Step 6: Final answer
    x = 1,921.37

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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.