Home / 3,190.40-4,785.60-2,607.20

Finding the Fourth Proportional to 3,190.40, 4,785.60 and 2,607.20

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Solution

The fourth proportional to 3,190.40, 4,785.60 and 2,607.20 is: 3,910.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,190.40 : 4,785.60 = 2,607.20 : x
  2. Step 2: Convert to fraction form
    3,190.40/4,785.60 = 2,607.20/x
  3. Step 3: Cross multiply
    3,190.40x = 4,785.60 × 2,607.20
  4. Step 4: Simplify right side
    3,190.40x = 12,477,016.32
  5. Step 5: Solve for x
    x = 12,477,016.32/3,190.40
  6. Step 6: Final answer
    x = 3,910.80

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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.