Home / 1,449.20-2,172.38-927.72

Finding the Fourth Proportional to 1,449.20, 2,172.38 and 927.72

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Solution

The fourth proportional to 1,449.20, 2,172.38 and 927.72 is: 1,390.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.20 : 2,172.38 = 927.72 : x
  2. Step 2: Convert to fraction form
    1,449.20/2,172.38 = 927.72/x
  3. Step 3: Cross multiply
    1,449.20x = 2,172.38 × 927.72
  4. Step 4: Simplify right side
    1,449.20x = 2,015,355.74
  5. Step 5: Solve for x
    x = 2,015,355.74/1,449.20
  6. Step 6: Final answer
    x = 1,390.67

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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.