Home / 2,189.42-3,285.04-1,313.61

Finding the Fourth Proportional to 2,189.42, 3,285.04 and 1,313.61

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Solution

The fourth proportional to 2,189.42, 3,285.04 and 1,313.61 is: 1,970.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.42 : 3,285.04 = 1,313.61 : x
  2. Step 2: Convert to fraction form
    2,189.42/3,285.04 = 1,313.61/x
  3. Step 3: Cross multiply
    2,189.42x = 3,285.04 × 1,313.61
  4. Step 4: Simplify right side
    2,189.42x = 4,315,261.39
  5. Step 5: Solve for x
    x = 4,315,261.39/2,189.42
  6. Step 6: Final answer
    x = 1,970.96

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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.