Home / 1,231.39-1,839.88-1,188.34

Finding the Fourth Proportional to 1,231.39, 1,839.88 and 1,188.34

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Solution

The fourth proportional to 1,231.39, 1,839.88 and 1,188.34 is: 1,775.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.39 : 1,839.88 = 1,188.34 : x
  2. Step 2: Convert to fraction form
    1,231.39/1,839.88 = 1,188.34/x
  3. Step 3: Cross multiply
    1,231.39x = 1,839.88 × 1,188.34
  4. Step 4: Simplify right side
    1,231.39x = 2,186,403.00
  5. Step 5: Solve for x
    x = 2,186,403.00/1,231.39
  6. Step 6: Final answer
    x = 1,775.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.