Home / 2,146.40-3,219.81-847.56

Finding the Fourth Proportional to 2,146.40, 3,219.81 and 847.56

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Solution

The fourth proportional to 2,146.40, 3,219.81 and 847.56 is: 1,271.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,146.40 : 3,219.81 = 847.56 : x
  2. Step 2: Convert to fraction form
    2,146.40/3,219.81 = 847.56/x
  3. Step 3: Cross multiply
    2,146.40x = 3,219.81 × 847.56
  4. Step 4: Simplify right side
    2,146.40x = 2,728,982.16
  5. Step 5: Solve for x
    x = 2,728,982.16/2,146.40
  6. Step 6: Final answer
    x = 1,271.42

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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.