Home / 3,218.40-4,825.85-1,138.32

Finding the Fourth Proportional to 3,218.40, 4,825.85 and 1,138.32

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Solution

The fourth proportional to 3,218.40, 4,825.85 and 1,138.32 is: 1,706.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.40 : 4,825.85 = 1,138.32 : x
  2. Step 2: Convert to fraction form
    3,218.40/4,825.85 = 1,138.32/x
  3. Step 3: Cross multiply
    3,218.40x = 4,825.85 × 1,138.32
  4. Step 4: Simplify right side
    3,218.40x = 5,493,355.88
  5. Step 5: Solve for x
    x = 5,493,355.88/3,218.40
  6. Step 6: Final answer
    x = 1,706.86

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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.