Home / 2,099.80-2,899.67-1,355.05

Finding the Fourth Proportional to 2,099.80, 2,899.67 and 1,355.05

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Solution

The fourth proportional to 2,099.80, 2,899.67 and 1,355.05 is: 1,871.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,099.80 : 2,899.67 = 1,355.05 : x
  2. Step 2: Convert to fraction form
    2,099.80/2,899.67 = 1,355.05/x
  3. Step 3: Cross multiply
    2,099.80x = 2,899.67 × 1,355.05
  4. Step 4: Simplify right side
    2,099.80x = 3,929,176.56
  5. Step 5: Solve for x
    x = 3,929,176.56/2,099.80
  6. Step 6: Final answer
    x = 1,871.22

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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.