Home / 2,169.21-2,993.60-1,225.20

Finding the Fourth Proportional to 2,169.21, 2,993.60 and 1,225.20

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Solution

The fourth proportional to 2,169.21, 2,993.60 and 1,225.20 is: 1,690.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.21 : 2,993.60 = 1,225.20 : x
  2. Step 2: Convert to fraction form
    2,169.21/2,993.60 = 1,225.20/x
  3. Step 3: Cross multiply
    2,169.21x = 2,993.60 × 1,225.20
  4. Step 4: Simplify right side
    2,169.21x = 3,667,752.59
  5. Step 5: Solve for x
    x = 3,667,752.59/2,169.21
  6. Step 6: Final answer
    x = 1,690.82

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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.