Home / 3,421.60-5,128.74-1,229.72

Finding the Fourth Proportional to 3,421.60, 5,128.74 and 1,229.72

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Solution

The fourth proportional to 3,421.60, 5,128.74 and 1,229.72 is: 1,843.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.60 : 5,128.74 = 1,229.72 : x
  2. Step 2: Convert to fraction form
    3,421.60/5,128.74 = 1,229.72/x
  3. Step 3: Cross multiply
    3,421.60x = 5,128.74 × 1,229.72
  4. Step 4: Simplify right side
    3,421.60x = 6,306,914.15
  5. Step 5: Solve for x
    x = 6,306,914.15/3,421.60
  6. Step 6: Final answer
    x = 1,843.26

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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.