Home / 2,130.20-2,939.69-1,198.70

Finding the Fourth Proportional to 2,130.20, 2,939.69 and 1,198.70

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Solution

The fourth proportional to 2,130.20, 2,939.69 and 1,198.70 is: 1,654.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.20 : 2,939.69 = 1,198.70 : x
  2. Step 2: Convert to fraction form
    2,130.20/2,939.69 = 1,198.70/x
  3. Step 3: Cross multiply
    2,130.20x = 2,939.69 × 1,198.70
  4. Step 4: Simplify right side
    2,130.20x = 3,523,806.40
  5. Step 5: Solve for x
    x = 3,523,806.40/2,130.20
  6. Step 6: Final answer
    x = 1,654.21

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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.