Home / 3,447.60-5,176.80-1,989.60

Finding the Fourth Proportional to 3,447.60, 5,176.80 and 1,989.60

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Solution

The fourth proportional to 3,447.60, 5,176.80 and 1,989.60 is: 2,987.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,447.60 : 5,176.80 = 1,989.60 : x
  2. Step 2: Convert to fraction form
    3,447.60/5,176.80 = 1,989.60/x
  3. Step 3: Cross multiply
    3,447.60x = 5,176.80 × 1,989.60
  4. Step 4: Simplify right side
    3,447.60x = 10,299,761.28
  5. Step 5: Solve for x
    x = 10,299,761.28/3,447.60
  6. Step 6: Final answer
    x = 2,987.52

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1.5x scale

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.