Home / 1,261.56-1,892.74-1,079.30

Finding the Fourth Proportional to 1,261.56, 1,892.74 and 1,079.30

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Solution

The fourth proportional to 1,261.56, 1,892.74 and 1,079.30 is: 1,619.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.56 : 1,892.74 = 1,079.30 : x
  2. Step 2: Convert to fraction form
    1,261.56/1,892.74 = 1,079.30/x
  3. Step 3: Cross multiply
    1,261.56x = 1,892.74 × 1,079.30
  4. Step 4: Simplify right side
    1,261.56x = 2,042,834.28
  5. Step 5: Solve for x
    x = 2,042,834.28/1,261.56
  6. Step 6: Final answer
    x = 1,619.29

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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.