Home / 1,977.51-2,729.38-1,645.61

Finding the Fourth Proportional to 1,977.51, 2,729.38 and 1,645.61

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Solution

The fourth proportional to 1,977.51, 2,729.38 and 1,645.61 is: 2,271.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.51 : 2,729.38 = 1,645.61 : x
  2. Step 2: Convert to fraction form
    1,977.51/2,729.38 = 1,645.61/x
  3. Step 3: Cross multiply
    1,977.51x = 2,729.38 × 1,645.61
  4. Step 4: Simplify right side
    1,977.51x = 4,491,495.02
  5. Step 5: Solve for x
    x = 4,491,495.02/1,977.51
  6. Step 6: Final answer
    x = 2,271.29

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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.