Home / 1,979.11-2,962.05-1,422.37

Finding the Fourth Proportional to 1,979.11, 2,962.05 and 1,422.37

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Solution

The fourth proportional to 1,979.11, 2,962.05 and 1,422.37 is: 2,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.11 : 2,962.05 = 1,422.37 : x
  2. Step 2: Convert to fraction form
    1,979.11/2,962.05 = 1,422.37/x
  3. Step 3: Cross multiply
    1,979.11x = 2,962.05 × 1,422.37
  4. Step 4: Simplify right side
    1,979.11x = 4,213,131.06
  5. Step 5: Solve for x
    x = 4,213,131.06/1,979.11
  6. Step 6: Final answer
    x = 2,128.80

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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.