Home / 2,130.28-2,939.62-1,245.96

Finding the Fourth Proportional to 2,130.28, 2,939.62 and 1,245.96

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Solution

The fourth proportional to 2,130.28, 2,939.62 and 1,245.96 is: 1,719.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.28 : 2,939.62 = 1,245.96 : x
  2. Step 2: Convert to fraction form
    2,130.28/2,939.62 = 1,245.96/x
  3. Step 3: Cross multiply
    2,130.28x = 2,939.62 × 1,245.96
  4. Step 4: Simplify right side
    2,130.28x = 3,662,648.94
  5. Step 5: Solve for x
    x = 3,662,648.94/2,130.28
  6. Step 6: Final answer
    x = 1,719.33

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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.