Home / 2,188.09-3,020.05-1,391.26

Finding the Fourth Proportional to 2,188.09, 3,020.05 and 1,391.26

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Solution

The fourth proportional to 2,188.09, 3,020.05 and 1,391.26 is: 1,920.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.09 : 3,020.05 = 1,391.26 : x
  2. Step 2: Convert to fraction form
    2,188.09/3,020.05 = 1,391.26/x
  3. Step 3: Cross multiply
    2,188.09x = 3,020.05 × 1,391.26
  4. Step 4: Simplify right side
    2,188.09x = 4,201,663.73
  5. Step 5: Solve for x
    x = 4,201,663.73/2,188.09
  6. Step 6: Final answer
    x = 1,920.24

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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.