Home / 2,127.20-3,190.85-1,200.45

Finding the Fourth Proportional to 2,127.20, 3,190.85 and 1,200.45

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Solution

The fourth proportional to 2,127.20, 3,190.85 and 1,200.45 is: 1,800.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.20 : 3,190.85 = 1,200.45 : x
  2. Step 2: Convert to fraction form
    2,127.20/3,190.85 = 1,200.45/x
  3. Step 3: Cross multiply
    2,127.20x = 3,190.85 × 1,200.45
  4. Step 4: Simplify right side
    2,127.20x = 3,830,449.88
  5. Step 5: Solve for x
    x = 3,830,449.88/2,127.20
  6. Step 6: Final answer
    x = 1,800.70

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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.