Home / 1,642.33-2,266.68-979.21

Finding the Fourth Proportional to 1,642.33, 2,266.68 and 979.21

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Solution

The fourth proportional to 1,642.33, 2,266.68 and 979.21 is: 1,351.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.33 : 2,266.68 = 979.21 : x
  2. Step 2: Convert to fraction form
    1,642.33/2,266.68 = 979.21/x
  3. Step 3: Cross multiply
    1,642.33x = 2,266.68 × 979.21
  4. Step 4: Simplify right side
    1,642.33x = 2,219,555.72
  5. Step 5: Solve for x
    x = 2,219,555.72/1,642.33
  6. Step 6: Final answer
    x = 1,351.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.