Home / 2,274.92-3,139.40-1,280.19

Finding the Fourth Proportional to 2,274.92, 3,139.40 and 1,280.19

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Solution

The fourth proportional to 2,274.92, 3,139.40 and 1,280.19 is: 1,766.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.92 : 3,139.40 = 1,280.19 : x
  2. Step 2: Convert to fraction form
    2,274.92/3,139.40 = 1,280.19/x
  3. Step 3: Cross multiply
    2,274.92x = 3,139.40 × 1,280.19
  4. Step 4: Simplify right side
    2,274.92x = 4,019,028.49
  5. Step 5: Solve for x
    x = 4,019,028.49/2,274.92
  6. Step 6: Final answer
    x = 1,766.67

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.