Home / 2,121.19-3,178.71-1,860.57

Finding the Fourth Proportional to 2,121.19, 3,178.71 and 1,860.57

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Solution

The fourth proportional to 2,121.19, 3,178.71 and 1,860.57 is: 2,788.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.19 : 3,178.71 = 1,860.57 : x
  2. Step 2: Convert to fraction form
    2,121.19/3,178.71 = 1,860.57/x
  3. Step 3: Cross multiply
    2,121.19x = 3,178.71 × 1,860.57
  4. Step 4: Simplify right side
    2,121.19x = 5,914,212.46
  5. Step 5: Solve for x
    x = 5,914,212.46/2,121.19
  6. Step 6: Final answer
    x = 2,788.16

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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.