Home / 1,939.12-2,905.62-1,157.20

Finding the Fourth Proportional to 1,939.12, 2,905.62 and 1,157.20

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Solution

The fourth proportional to 1,939.12, 2,905.62 and 1,157.20 is: 1,733.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.12 : 2,905.62 = 1,157.20 : x
  2. Step 2: Convert to fraction form
    1,939.12/2,905.62 = 1,157.20/x
  3. Step 3: Cross multiply
    1,939.12x = 2,905.62 × 1,157.20
  4. Step 4: Simplify right side
    1,939.12x = 3,362,383.46
  5. Step 5: Solve for x
    x = 3,362,383.46/1,939.12
  6. Step 6: Final answer
    x = 1,733.97

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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.