Home / 2,765.32-4,149.12-1,121.45

Finding the Fourth Proportional to 2,765.32, 4,149.12 and 1,121.45

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Solution

The fourth proportional to 2,765.32, 4,149.12 and 1,121.45 is: 1,682.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.32 : 4,149.12 = 1,121.45 : x
  2. Step 2: Convert to fraction form
    2,765.32/4,149.12 = 1,121.45/x
  3. Step 3: Cross multiply
    2,765.32x = 4,149.12 × 1,121.45
  4. Step 4: Simplify right side
    2,765.32x = 4,653,030.62
  5. Step 5: Solve for x
    x = 4,653,030.62/2,765.32
  6. Step 6: Final answer
    x = 1,682.64

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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.