Home / 1,986.09-2,740.70-1,089.81

Finding the Fourth Proportional to 1,986.09, 2,740.70 and 1,089.81

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Solution

The fourth proportional to 1,986.09, 2,740.70 and 1,089.81 is: 1,503.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.09 : 2,740.70 = 1,089.81 : x
  2. Step 2: Convert to fraction form
    1,986.09/2,740.70 = 1,089.81/x
  3. Step 3: Cross multiply
    1,986.09x = 2,740.70 × 1,089.81
  4. Step 4: Simplify right side
    1,986.09x = 2,986,842.27
  5. Step 5: Solve for x
    x = 2,986,842.27/1,986.09
  6. Step 6: Final answer
    x = 1,503.88

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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.