Home / 2,108.04-2,909.20-1,321.80

Finding the Fourth Proportional to 2,108.04, 2,909.20 and 1,321.80

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Solution

The fourth proportional to 2,108.04, 2,909.20 and 1,321.80 is: 1,824.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.04 : 2,909.20 = 1,321.80 : x
  2. Step 2: Convert to fraction form
    2,108.04/2,909.20 = 1,321.80/x
  3. Step 3: Cross multiply
    2,108.04x = 2,909.20 × 1,321.80
  4. Step 4: Simplify right side
    2,108.04x = 3,845,380.56
  5. Step 5: Solve for x
    x = 3,845,380.56/2,108.04
  6. Step 6: Final answer
    x = 1,824.15

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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.