Home / 2,785.56-4,172.68-1,320.28

Finding the Fourth Proportional to 2,785.56, 4,172.68 and 1,320.28

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Solution

The fourth proportional to 2,785.56, 4,172.68 and 1,320.28 is: 1,977.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.56 : 4,172.68 = 1,320.28 : x
  2. Step 2: Convert to fraction form
    2,785.56/4,172.68 = 1,320.28/x
  3. Step 3: Cross multiply
    2,785.56x = 4,172.68 × 1,320.28
  4. Step 4: Simplify right side
    2,785.56x = 5,509,105.95
  5. Step 5: Solve for x
    x = 5,509,105.95/2,785.56
  6. Step 6: Final answer
    x = 1,977.74

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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.