Home / 3,098.31-4,271.18-1,978.39

Finding the Fourth Proportional to 3,098.31, 4,271.18 and 1,978.39

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Solution

The fourth proportional to 3,098.31, 4,271.18 and 1,978.39 is: 2,727.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,098.31 : 4,271.18 = 1,978.39 : x
  2. Step 2: Convert to fraction form
    3,098.31/4,271.18 = 1,978.39/x
  3. Step 3: Cross multiply
    3,098.31x = 4,271.18 × 1,978.39
  4. Step 4: Simplify right side
    3,098.31x = 8,450,059.80
  5. Step 5: Solve for x
    x = 8,450,059.80/3,098.31
  6. Step 6: Final answer
    x = 2,727.31

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1.5x scale

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.