Home / 2,686.20-4,029.29-1,299.67

Finding the Fourth Proportional to 2,686.20, 4,029.29 and 1,299.67

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Solution

The fourth proportional to 2,686.20, 4,029.29 and 1,299.67 is: 1,949.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.20 : 4,029.29 = 1,299.67 : x
  2. Step 2: Convert to fraction form
    2,686.20/4,029.29 = 1,299.67/x
  3. Step 3: Cross multiply
    2,686.20x = 4,029.29 × 1,299.67
  4. Step 4: Simplify right side
    2,686.20x = 5,236,735.64
  5. Step 5: Solve for x
    x = 5,236,735.64/2,686.20
  6. Step 6: Final answer
    x = 1,949.50

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Half scale
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Double scale
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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.