Home / 3,086.96-4,629.81-1,138.70

Finding the Fourth Proportional to 3,086.96, 4,629.81 and 1,138.70

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Solution

The fourth proportional to 3,086.96, 4,629.81 and 1,138.70 is: 1,707.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086.96 : 4,629.81 = 1,138.70 : x
  2. Step 2: Convert to fraction form
    3,086.96/4,629.81 = 1,138.70/x
  3. Step 3: Cross multiply
    3,086.96x = 4,629.81 × 1,138.70
  4. Step 4: Simplify right side
    3,086.96x = 5,271,941.50
  5. Step 5: Solve for x
    x = 5,271,941.50/3,086.96
  6. Step 6: Final answer
    x = 1,707.81

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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.