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Finding the Fourth Proportional to 3,768.90, 5,653.14 and 1,815.18

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Solution

The fourth proportional to 3,768.90, 5,653.14 and 1,815.18 is: 2,722.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,768.90 : 5,653.14 = 1,815.18 : x
  2. Step 2: Convert to fraction form
    3,768.90/5,653.14 = 1,815.18/x
  3. Step 3: Cross multiply
    3,768.90x = 5,653.14 × 1,815.18
  4. Step 4: Simplify right side
    3,768.90x = 10,261,466.67
  5. Step 5: Solve for x
    x = 10,261,466.67/3,768.90
  6. Step 6: Final answer
    x = 2,722.67

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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.