Home / 1,481.30-2,219.33-786.47

Finding the Fourth Proportional to 1,481.30, 2,219.33 and 786.47

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Solution

The fourth proportional to 1,481.30, 2,219.33 and 786.47 is: 1,178.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.30 : 2,219.33 = 786.47 : x
  2. Step 2: Convert to fraction form
    1,481.30/2,219.33 = 786.47/x
  3. Step 3: Cross multiply
    1,481.30x = 2,219.33 × 786.47
  4. Step 4: Simplify right side
    1,481.30x = 1,745,421.44
  5. Step 5: Solve for x
    x = 1,745,421.44/1,481.30
  6. Step 6: Final answer
    x = 1,178.31

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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.