Home / 2,078.98-3,118.46-1,387.00

Finding the Fourth Proportional to 2,078.98, 3,118.46 and 1,387.00

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Solution

The fourth proportional to 2,078.98, 3,118.46 and 1,387.00 is: 2,080.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.98 : 3,118.46 = 1,387.00 : x
  2. Step 2: Convert to fraction form
    2,078.98/3,118.46 = 1,387.00/x
  3. Step 3: Cross multiply
    2,078.98x = 3,118.46 × 1,387.00
  4. Step 4: Simplify right side
    2,078.98x = 4,325,288.43
  5. Step 5: Solve for x
    x = 4,325,288.43/2,078.98
  6. Step 6: Final answer
    x = 2,080.49

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1.5x scale

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.