Home / 3,240.72-4,472.25-1,981.62

Finding the Fourth Proportional to 3,240.72, 4,472.25 and 1,981.62

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Solution

The fourth proportional to 3,240.72, 4,472.25 and 1,981.62 is: 2,734.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.72 : 4,472.25 = 1,981.62 : x
  2. Step 2: Convert to fraction form
    3,240.72/4,472.25 = 1,981.62/x
  3. Step 3: Cross multiply
    3,240.72x = 4,472.25 × 1,981.62
  4. Step 4: Simplify right side
    3,240.72x = 8,862,300.05
  5. Step 5: Solve for x
    x = 8,862,300.05/3,240.72
  6. Step 6: Final answer
    x = 2,734.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.