Home / 1,040.21-1,560.31-270.71

Finding the Fourth Proportional to 1,040.21, 1,560.31 and 270.71

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Solution

The fourth proportional to 1,040.21, 1,560.31 and 270.71 is: 406.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.21 : 1,560.31 = 270.71 : x
  2. Step 2: Convert to fraction form
    1,040.21/1,560.31 = 270.71/x
  3. Step 3: Cross multiply
    1,040.21x = 1,560.31 × 270.71
  4. Step 4: Simplify right side
    1,040.21x = 422,388.89
  5. Step 5: Solve for x
    x = 422,388.89/1,040.21
  6. Step 6: Final answer
    x = 406.06

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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.