Home / 3,979.08-5,968.65-1,380.20

Finding the Fourth Proportional to 3,979.08, 5,968.65 and 1,380.20

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Solution

The fourth proportional to 3,979.08, 5,968.65 and 1,380.20 is: 2,070.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.08 : 5,968.65 = 1,380.20 : x
  2. Step 2: Convert to fraction form
    3,979.08/5,968.65 = 1,380.20/x
  3. Step 3: Cross multiply
    3,979.08x = 5,968.65 × 1,380.20
  4. Step 4: Simplify right side
    3,979.08x = 8,237,900.89
  5. Step 5: Solve for x
    x = 8,237,900.89/3,979.08
  6. Step 6: Final answer
    x = 2,070.30

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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.