Home / 2,154.12-3,231.24-767.43

Finding the Fourth Proportional to 2,154.12, 3,231.24 and 767.43

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Solution

The fourth proportional to 2,154.12, 3,231.24 and 767.43 is: 1,151.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.12 : 3,231.24 = 767.43 : x
  2. Step 2: Convert to fraction form
    2,154.12/3,231.24 = 767.43/x
  3. Step 3: Cross multiply
    2,154.12x = 3,231.24 × 767.43
  4. Step 4: Simplify right side
    2,154.12x = 2,479,750.51
  5. Step 5: Solve for x
    x = 2,479,750.51/2,154.12
  6. Step 6: Final answer
    x = 1,151.17

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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.