Home / 2,209.80-3,313.62-1,285.68

Finding the Fourth Proportional to 2,209.80, 3,313.62 and 1,285.68

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Solution

The fourth proportional to 2,209.80, 3,313.62 and 1,285.68 is: 1,927.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.80 : 3,313.62 = 1,285.68 : x
  2. Step 2: Convert to fraction form
    2,209.80/3,313.62 = 1,285.68/x
  3. Step 3: Cross multiply
    2,209.80x = 3,313.62 × 1,285.68
  4. Step 4: Simplify right side
    2,209.80x = 4,260,254.96
  5. Step 5: Solve for x
    x = 4,260,254.96/2,209.80
  6. Step 6: Final answer
    x = 1,927.89

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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.