Home / 1,290.98-1,936.61-425.29

Finding the Fourth Proportional to 1,290.98, 1,936.61 and 425.29

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Solution

The fourth proportional to 1,290.98, 1,936.61 and 425.29 is: 637.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.98 : 1,936.61 = 425.29 : x
  2. Step 2: Convert to fraction form
    1,290.98/1,936.61 = 425.29/x
  3. Step 3: Cross multiply
    1,290.98x = 1,936.61 × 425.29
  4. Step 4: Simplify right side
    1,290.98x = 823,620.87
  5. Step 5: Solve for x
    x = 823,620.87/1,290.98
  6. Step 6: Final answer
    x = 637.98

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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.