Home / 1,628.50-2,246.78-998.80

Finding the Fourth Proportional to 1,628.50, 2,246.78 and 998.80

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Solution

The fourth proportional to 1,628.50, 2,246.78 and 998.80 is: 1,378.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.50 : 2,246.78 = 998.80 : x
  2. Step 2: Convert to fraction form
    1,628.50/2,246.78 = 998.80/x
  3. Step 3: Cross multiply
    1,628.50x = 2,246.78 × 998.80
  4. Step 4: Simplify right side
    1,628.50x = 2,244,083.86
  5. Step 5: Solve for x
    x = 2,244,083.86/1,628.50
  6. Step 6: Final answer
    x = 1,378.01

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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.