Home / 1,120.20-1,677.90-998.60

Finding the Fourth Proportional to 1,120.20, 1,677.90 and 998.60

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Solution

The fourth proportional to 1,120.20, 1,677.90 and 998.60 is: 1,495.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.20 : 1,677.90 = 998.60 : x
  2. Step 2: Convert to fraction form
    1,120.20/1,677.90 = 998.60/x
  3. Step 3: Cross multiply
    1,120.20x = 1,677.90 × 998.60
  4. Step 4: Simplify right side
    1,120.20x = 1,675,550.94
  5. Step 5: Solve for x
    x = 1,675,550.94/1,120.20
  6. Step 6: Final answer
    x = 1,495.76

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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.