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Finding the Fourth Proportional to 1,485.44, 2,226.32 and 618.96

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Solution

The fourth proportional to 1,485.44, 2,226.32 and 618.96 is: 927.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.44 : 2,226.32 = 618.96 : x
  2. Step 2: Convert to fraction form
    1,485.44/2,226.32 = 618.96/x
  3. Step 3: Cross multiply
    1,485.44x = 2,226.32 × 618.96
  4. Step 4: Simplify right side
    1,485.44x = 1,378,003.03
  5. Step 5: Solve for x
    x = 1,378,003.03/1,485.44
  6. Step 6: Final answer
    x = 927.67

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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.