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Finding the Fourth Proportional to 5,608.40, 8,412.60 and 3,858.80

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Solution

The fourth proportional to 5,608.40, 8,412.60 and 3,858.80 is: 5,788.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,608.40 : 8,412.60 = 3,858.80 : x
  2. Step 2: Convert to fraction form
    5,608.40/8,412.60 = 3,858.80/x
  3. Step 3: Cross multiply
    5,608.40x = 8,412.60 × 3,858.80
  4. Step 4: Simplify right side
    5,608.40x = 32,462,540.88
  5. Step 5: Solve for x
    x = 32,462,540.88/5,608.40
  6. Step 6: Final answer
    x = 5,788.20

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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.