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Finding the Fourth Proportional to 1,396.56, 1,928.07 and 873.30

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Solution

The fourth proportional to 1,396.56, 1,928.07 and 873.30 is: 1,205.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.56 : 1,928.07 = 873.30 : x
  2. Step 2: Convert to fraction form
    1,396.56/1,928.07 = 873.30/x
  3. Step 3: Cross multiply
    1,396.56x = 1,928.07 × 873.30
  4. Step 4: Simplify right side
    1,396.56x = 1,683,783.53
  5. Step 5: Solve for x
    x = 1,683,783.53/1,396.56
  6. Step 6: Final answer
    x = 1,205.67

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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.