Home / 2,188.48-3,019.66-1,392.12

Finding the Fourth Proportional to 2,188.48, 3,019.66 and 1,392.12

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Solution

The fourth proportional to 2,188.48, 3,019.66 and 1,392.12 is: 1,920.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.48 : 3,019.66 = 1,392.12 : x
  2. Step 2: Convert to fraction form
    2,188.48/3,019.66 = 1,392.12/x
  3. Step 3: Cross multiply
    2,188.48x = 3,019.66 × 1,392.12
  4. Step 4: Simplify right side
    2,188.48x = 4,203,729.08
  5. Step 5: Solve for x
    x = 4,203,729.08/2,188.48
  6. Step 6: Final answer
    x = 1,920.84

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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.