Home / 2,212.75-3,313.65-1,285.50

Finding the Fourth Proportional to 2,212.75, 3,313.65 and 1,285.50

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Solution

The fourth proportional to 2,212.75, 3,313.65 and 1,285.50 is: 1,925.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.75 : 3,313.65 = 1,285.50 : x
  2. Step 2: Convert to fraction form
    2,212.75/3,313.65 = 1,285.50/x
  3. Step 3: Cross multiply
    2,212.75x = 3,313.65 × 1,285.50
  4. Step 4: Simplify right side
    2,212.75x = 4,259,692.00
  5. Step 5: Solve for x
    x = 4,259,692.00/2,212.75
  6. Step 6: Final answer
    x = 1,925.06

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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.