Home / 1,998.04-2,756.50-1,289.80

Finding the Fourth Proportional to 1,998.04, 2,756.50 and 1,289.80

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Solution

The fourth proportional to 1,998.04, 2,756.50 and 1,289.80 is: 1,779.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.04 : 2,756.50 = 1,289.80 : x
  2. Step 2: Convert to fraction form
    1,998.04/2,756.50 = 1,289.80/x
  3. Step 3: Cross multiply
    1,998.04x = 2,756.50 × 1,289.80
  4. Step 4: Simplify right side
    1,998.04x = 3,555,333.70
  5. Step 5: Solve for x
    x = 3,555,333.70/1,998.04
  6. Step 6: Final answer
    x = 1,779.41

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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.