Home / 2,786.10-4,171.05-1,689.90

Finding the Fourth Proportional to 2,786.10, 4,171.05 and 1,689.90

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Solution

The fourth proportional to 2,786.10, 4,171.05 and 1,689.90 is: 2,529.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.10 : 4,171.05 = 1,689.90 : x
  2. Step 2: Convert to fraction form
    2,786.10/4,171.05 = 1,689.90/x
  3. Step 3: Cross multiply
    2,786.10x = 4,171.05 × 1,689.90
  4. Step 4: Simplify right side
    2,786.10x = 7,048,657.40
  5. Step 5: Solve for x
    x = 7,048,657.40/2,786.10
  6. Step 6: Final answer
    x = 2,529.94

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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.