Home / 4,218.60-6,321.78-1,618.68

Finding the Fourth Proportional to 4,218.60, 6,321.78 and 1,618.68

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Solution

The fourth proportional to 4,218.60, 6,321.78 and 1,618.68 is: 2,425.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,218.60 : 6,321.78 = 1,618.68 : x
  2. Step 2: Convert to fraction form
    4,218.60/6,321.78 = 1,618.68/x
  3. Step 3: Cross multiply
    4,218.60x = 6,321.78 × 1,618.68
  4. Step 4: Simplify right side
    4,218.60x = 10,232,938.85
  5. Step 5: Solve for x
    x = 10,232,938.85/4,218.60
  6. Step 6: Final answer
    x = 2,425.67

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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.