Home / 1,327.07-1,990.34-1,261.21

Finding the Fourth Proportional to 1,327.07, 1,990.34 and 1,261.21

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Solution

The fourth proportional to 1,327.07, 1,990.34 and 1,261.21 is: 1,891.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.07 : 1,990.34 = 1,261.21 : x
  2. Step 2: Convert to fraction form
    1,327.07/1,990.34 = 1,261.21/x
  3. Step 3: Cross multiply
    1,327.07x = 1,990.34 × 1,261.21
  4. Step 4: Simplify right side
    1,327.07x = 2,510,233.89
  5. Step 5: Solve for x
    x = 2,510,233.89/1,327.07
  6. Step 6: Final answer
    x = 1,891.57

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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.