Home / 2,772.46-4,157.67-1,128.12

Finding the Fourth Proportional to 2,772.46, 4,157.67 and 1,128.12

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Solution

The fourth proportional to 2,772.46, 4,157.67 and 1,128.12 is: 1,691.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,772.46 : 4,157.67 = 1,128.12 : x
  2. Step 2: Convert to fraction form
    2,772.46/4,157.67 = 1,128.12/x
  3. Step 3: Cross multiply
    2,772.46x = 4,157.67 × 1,128.12
  4. Step 4: Simplify right side
    2,772.46x = 4,690,339.32
  5. Step 5: Solve for x
    x = 4,690,339.32/2,772.46
  6. Step 6: Final answer
    x = 1,691.76

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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.