Home / 2,130.28-2,939.02-1,198.78

Finding the Fourth Proportional to 2,130.28, 2,939.02 and 1,198.78

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Solution

The fourth proportional to 2,130.28, 2,939.02 and 1,198.78 is: 1,653.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.28 : 2,939.02 = 1,198.78 : x
  2. Step 2: Convert to fraction form
    2,130.28/2,939.02 = 1,198.78/x
  3. Step 3: Cross multiply
    2,130.28x = 2,939.02 × 1,198.78
  4. Step 4: Simplify right side
    2,130.28x = 3,523,238.40
  5. Step 5: Solve for x
    x = 3,523,238.40/2,130.28
  6. Step 6: Final answer
    x = 1,653.89

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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.