Home / 3,120.78-4,683.23-1,365.72

Finding the Fourth Proportional to 3,120.78, 4,683.23 and 1,365.72

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Solution

The fourth proportional to 3,120.78, 4,683.23 and 1,365.72 is: 2,049.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.78 : 4,683.23 = 1,365.72 : x
  2. Step 2: Convert to fraction form
    3,120.78/4,683.23 = 1,365.72/x
  3. Step 3: Cross multiply
    3,120.78x = 4,683.23 × 1,365.72
  4. Step 4: Simplify right side
    3,120.78x = 6,395,980.88
  5. Step 5: Solve for x
    x = 6,395,980.88/3,120.78
  6. Step 6: Final answer
    x = 2,049.48

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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.