Home / 2,780.28-3,836.21-1,660.81

Finding the Fourth Proportional to 2,780.28, 3,836.21 and 1,660.81

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Solution

The fourth proportional to 2,780.28, 3,836.21 and 1,660.81 is: 2,291.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.28 : 3,836.21 = 1,660.81 : x
  2. Step 2: Convert to fraction form
    2,780.28/3,836.21 = 1,660.81/x
  3. Step 3: Cross multiply
    2,780.28x = 3,836.21 × 1,660.81
  4. Step 4: Simplify right side
    2,780.28x = 6,371,210.49
  5. Step 5: Solve for x
    x = 6,371,210.49/2,780.28
  6. Step 6: Final answer
    x = 2,291.57

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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.