Home / 2,866.80-3,956.55-1,687.98

Finding the Fourth Proportional to 2,866.80, 3,956.55 and 1,687.98

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Solution

The fourth proportional to 2,866.80, 3,956.55 and 1,687.98 is: 2,329.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,866.80 : 3,956.55 = 1,687.98 : x
  2. Step 2: Convert to fraction form
    2,866.80/3,956.55 = 1,687.98/x
  3. Step 3: Cross multiply
    2,866.80x = 3,956.55 × 1,687.98
  4. Step 4: Simplify right side
    2,866.80x = 6,678,577.27
  5. Step 5: Solve for x
    x = 6,678,577.27/2,866.80
  6. Step 6: Final answer
    x = 2,329.63

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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.