Home / 2,765.59-4,148.21-1,121.70

Finding the Fourth Proportional to 2,765.59, 4,148.21 and 1,121.70

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Solution

The fourth proportional to 2,765.59, 4,148.21 and 1,121.70 is: 1,682.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.59 : 4,148.21 = 1,121.70 : x
  2. Step 2: Convert to fraction form
    2,765.59/4,148.21 = 1,121.70/x
  3. Step 3: Cross multiply
    2,765.59x = 4,148.21 × 1,121.70
  4. Step 4: Simplify right side
    2,765.59x = 4,653,042.18
  5. Step 5: Solve for x
    x = 4,653,042.18/2,765.59
  6. Step 6: Final answer
    x = 1,682.48

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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.