Home / 3,131.64-4,701.30-1,982.20

Finding the Fourth Proportional to 3,131.64, 4,701.30 and 1,982.20

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Solution

The fourth proportional to 3,131.64, 4,701.30 and 1,982.20 is: 2,975.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.64 : 4,701.30 = 1,982.20 : x
  2. Step 2: Convert to fraction form
    3,131.64/4,701.30 = 1,982.20/x
  3. Step 3: Cross multiply
    3,131.64x = 4,701.30 × 1,982.20
  4. Step 4: Simplify right side
    3,131.64x = 9,318,916.86
  5. Step 5: Solve for x
    x = 9,318,916.86/3,131.64
  6. Step 6: Final answer
    x = 2,975.73

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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.