Home / 3,118.90-4,679.20-1,269.60

Finding the Fourth Proportional to 3,118.90, 4,679.20 and 1,269.60

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Solution

The fourth proportional to 3,118.90, 4,679.20 and 1,269.60 is: 1,904.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.90 : 4,679.20 = 1,269.60 : x
  2. Step 2: Convert to fraction form
    3,118.90/4,679.20 = 1,269.60/x
  3. Step 3: Cross multiply
    3,118.90x = 4,679.20 × 1,269.60
  4. Step 4: Simplify right side
    3,118.90x = 5,940,712.32
  5. Step 5: Solve for x
    x = 5,940,712.32/3,118.90
  6. Step 6: Final answer
    x = 1,904.75

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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.