Home / 1,425.56-2,135.60-839.32

Finding the Fourth Proportional to 1,425.56, 2,135.60 and 839.32

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Solution

The fourth proportional to 1,425.56, 2,135.60 and 839.32 is: 1,257.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.56 : 2,135.60 = 839.32 : x
  2. Step 2: Convert to fraction form
    1,425.56/2,135.60 = 839.32/x
  3. Step 3: Cross multiply
    1,425.56x = 2,135.60 × 839.32
  4. Step 4: Simplify right side
    1,425.56x = 1,792,451.79
  5. Step 5: Solve for x
    x = 1,792,451.79/1,425.56
  6. Step 6: Final answer
    x = 1,257.37

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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.