Home / 1,518.34-2,279.49-788.43

Finding the Fourth Proportional to 1,518.34, 2,279.49 and 788.43

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Solution

The fourth proportional to 1,518.34, 2,279.49 and 788.43 is: 1,183.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.34 : 2,279.49 = 788.43 : x
  2. Step 2: Convert to fraction form
    1,518.34/2,279.49 = 788.43/x
  3. Step 3: Cross multiply
    1,518.34x = 2,279.49 × 788.43
  4. Step 4: Simplify right side
    1,518.34x = 1,797,214.36
  5. Step 5: Solve for x
    x = 1,797,214.36/1,518.34
  6. Step 6: Final answer
    x = 1,183.67

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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.