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Finding the Fourth Proportional to 1,281.22, 1,921.83 and 1,119.22

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Solution

The fourth proportional to 1,281.22, 1,921.83 and 1,119.22 is: 1,678.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.22 : 1,921.83 = 1,119.22 : x
  2. Step 2: Convert to fraction form
    1,281.22/1,921.83 = 1,119.22/x
  3. Step 3: Cross multiply
    1,281.22x = 1,921.83 × 1,119.22
  4. Step 4: Simplify right side
    1,281.22x = 2,150,950.57
  5. Step 5: Solve for x
    x = 2,150,950.57/1,281.22
  6. Step 6: Final answer
    x = 1,678.83

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Similar ratio
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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.