Home / 3,161.12-4,742.58-1,311.89

Finding the Fourth Proportional to 3,161.12, 4,742.58 and 1,311.89

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Solution

The fourth proportional to 3,161.12, 4,742.58 and 1,311.89 is: 1,968.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.12 : 4,742.58 = 1,311.89 : x
  2. Step 2: Convert to fraction form
    3,161.12/4,742.58 = 1,311.89/x
  3. Step 3: Cross multiply
    3,161.12x = 4,742.58 × 1,311.89
  4. Step 4: Simplify right side
    3,161.12x = 6,221,724.48
  5. Step 5: Solve for x
    x = 6,221,724.48/3,161.12
  6. Step 6: Final answer
    x = 1,968.21

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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.