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Finding the Fourth Proportional to 3,608.60, 5,412.90 and 2,879.60

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Solution

The fourth proportional to 3,608.60, 5,412.90 and 2,879.60 is: 4,319.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.60 : 5,412.90 = 2,879.60 : x
  2. Step 2: Convert to fraction form
    3,608.60/5,412.90 = 2,879.60/x
  3. Step 3: Cross multiply
    3,608.60x = 5,412.90 × 2,879.60
  4. Step 4: Simplify right side
    3,608.60x = 15,586,986.84
  5. Step 5: Solve for x
    x = 15,586,986.84/3,608.60
  6. Step 6: Final answer
    x = 4,319.40

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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.