Home / 1,290.94-1,936.41-425.25

Finding the Fourth Proportional to 1,290.94, 1,936.41 and 425.25

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Solution

The fourth proportional to 1,290.94, 1,936.41 and 425.25 is: 637.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.94 : 1,936.41 = 425.25 : x
  2. Step 2: Convert to fraction form
    1,290.94/1,936.41 = 425.25/x
  3. Step 3: Cross multiply
    1,290.94x = 1,936.41 × 425.25
  4. Step 4: Simplify right side
    1,290.94x = 823,456.76
  5. Step 5: Solve for x
    x = 823,456.76/1,290.94
  6. Step 6: Final answer
    x = 637.88

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Double scale
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Similar ratio
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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.