Home / 2,188.46-3,020.57-1,391.63

Finding the Fourth Proportional to 2,188.46, 3,020.57 and 1,391.63

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Solution

The fourth proportional to 2,188.46, 3,020.57 and 1,391.63 is: 1,920.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.46 : 3,020.57 = 1,391.63 : x
  2. Step 2: Convert to fraction form
    2,188.46/3,020.57 = 1,391.63/x
  3. Step 3: Cross multiply
    2,188.46x = 3,020.57 × 1,391.63
  4. Step 4: Simplify right side
    2,188.46x = 4,203,515.83
  5. Step 5: Solve for x
    x = 4,203,515.83/2,188.46
  6. Step 6: Final answer
    x = 1,920.76

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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.