Home / 2,188.16-3,020.14-1,391.32

Finding the Fourth Proportional to 2,188.16, 3,020.14 and 1,391.32

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Solution

The fourth proportional to 2,188.16, 3,020.14 and 1,391.32 is: 1,920.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.16 : 3,020.14 = 1,391.32 : x
  2. Step 2: Convert to fraction form
    2,188.16/3,020.14 = 1,391.32/x
  3. Step 3: Cross multiply
    2,188.16x = 3,020.14 × 1,391.32
  4. Step 4: Simplify right side
    2,188.16x = 4,201,966.08
  5. Step 5: Solve for x
    x = 4,201,966.08/2,188.16
  6. Step 6: Final answer
    x = 1,920.32

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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.