Home / 1,986.45-2,984.24-1,402.80

Finding the Fourth Proportional to 1,986.45, 2,984.24 and 1,402.80

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Solution

The fourth proportional to 1,986.45, 2,984.24 and 1,402.80 is: 2,107.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.45 : 2,984.24 = 1,402.80 : x
  2. Step 2: Convert to fraction form
    1,986.45/2,984.24 = 1,402.80/x
  3. Step 3: Cross multiply
    1,986.45x = 2,984.24 × 1,402.80
  4. Step 4: Simplify right side
    1,986.45x = 4,186,284.86
  5. Step 5: Solve for x
    x = 4,186,284.86/1,986.45
  6. Step 6: Final answer
    x = 2,107.42

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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.