Home / 2,028.20-3,042.30-988.70

Finding the Fourth Proportional to 2,028.20, 3,042.30 and 988.70

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Solution

The fourth proportional to 2,028.20, 3,042.30 and 988.70 is: 1,483.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,028.20 : 3,042.30 = 988.70 : x
  2. Step 2: Convert to fraction form
    2,028.20/3,042.30 = 988.70/x
  3. Step 3: Cross multiply
    2,028.20x = 3,042.30 × 988.70
  4. Step 4: Simplify right side
    2,028.20x = 3,007,922.01
  5. Step 5: Solve for x
    x = 3,007,922.01/2,028.20
  6. Step 6: Final answer
    x = 1,483.05

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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.