Home / 2,655-3,986.61-1,424.81

Finding the Fourth Proportional to 2,655, 3,986.61 and 1,424.81

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Solution

The fourth proportional to 2,655, 3,986.61 and 1,424.81 is: 2,139.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655 : 3,986.61 = 1,424.81 : x
  2. Step 2: Convert to fraction form
    2,655/3,986.61 = 1,424.81/x
  3. Step 3: Cross multiply
    2,655x = 3,986.61 × 1,424.81
  4. Step 4: Simplify right side
    2,655x = 5,680,161.79
  5. Step 5: Solve for x
    x = 5,680,161.79/2,655
  6. Step 6: Final answer
    x = 2,139.42

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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.