Home / 3,982.02-5,975.42-1,386.78

Finding the Fourth Proportional to 3,982.02, 5,975.42 and 1,386.78

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Solution

The fourth proportional to 3,982.02, 5,975.42 and 1,386.78 is: 2,081.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,982.02 : 5,975.42 = 1,386.78 : x
  2. Step 2: Convert to fraction form
    3,982.02/5,975.42 = 1,386.78/x
  3. Step 3: Cross multiply
    3,982.02x = 5,975.42 × 1,386.78
  4. Step 4: Simplify right side
    3,982.02x = 8,286,592.95
  5. Step 5: Solve for x
    x = 8,286,592.95/3,982.02
  6. Step 6: Final answer
    x = 2,081.00

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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.