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Finding the Fourth Proportional to 3,626.45, 5,439.66 and 890.45

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Solution

The fourth proportional to 3,626.45, 5,439.66 and 890.45 is: 1,335.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,626.45 : 5,439.66 = 890.45 : x
  2. Step 2: Convert to fraction form
    3,626.45/5,439.66 = 890.45/x
  3. Step 3: Cross multiply
    3,626.45x = 5,439.66 × 890.45
  4. Step 4: Simplify right side
    3,626.45x = 4,843,718.05
  5. Step 5: Solve for x
    x = 4,843,718.05/3,626.45
  6. Step 6: Final answer
    x = 1,335.67

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Similar ratio
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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.