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Finding the Fourth Proportional to 5,649.60, 8,479.80 and 2,879.40

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Solution

The fourth proportional to 5,649.60, 8,479.80 and 2,879.40 is: 4,321.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,649.60 : 8,479.80 = 2,879.40 : x
  2. Step 2: Convert to fraction form
    5,649.60/8,479.80 = 2,879.40/x
  3. Step 3: Cross multiply
    5,649.60x = 8,479.80 × 2,879.40
  4. Step 4: Simplify right side
    5,649.60x = 24,416,736.12
  5. Step 5: Solve for x
    x = 24,416,736.12/5,649.60
  6. Step 6: Final answer
    x = 4,321.85

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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.