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Finding the Fourth Proportional to 3,893.54, 5,840.56 and 1,120.40

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Solution

The fourth proportional to 3,893.54, 5,840.56 and 1,120.40 is: 1,680.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,893.54 : 5,840.56 = 1,120.40 : x
  2. Step 2: Convert to fraction form
    3,893.54/5,840.56 = 1,120.40/x
  3. Step 3: Cross multiply
    3,893.54x = 5,840.56 × 1,120.40
  4. Step 4: Simplify right side
    3,893.54x = 6,543,763.42
  5. Step 5: Solve for x
    x = 6,543,763.42/3,893.54
  6. Step 6: Final answer
    x = 1,680.67

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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.