Home / 1,380.25-2,070.38-1,311.04

Finding the Fourth Proportional to 1,380.25, 2,070.38 and 1,311.04

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Solution

The fourth proportional to 1,380.25, 2,070.38 and 1,311.04 is: 1,966.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.25 : 2,070.38 = 1,311.04 : x
  2. Step 2: Convert to fraction form
    1,380.25/2,070.38 = 1,311.04/x
  3. Step 3: Cross multiply
    1,380.25x = 2,070.38 × 1,311.04
  4. Step 4: Simplify right side
    1,380.25x = 2,714,351.00
  5. Step 5: Solve for x
    x = 2,714,351.00/1,380.25
  6. Step 6: Final answer
    x = 1,966.56

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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.