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Finding the Fourth Proportional to 2,324.64, 3,486.78 and 681.15

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Solution

The fourth proportional to 2,324.64, 3,486.78 and 681.15 is: 1,021.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,324.64 : 3,486.78 = 681.15 : x
  2. Step 2: Convert to fraction form
    2,324.64/3,486.78 = 681.15/x
  3. Step 3: Cross multiply
    2,324.64x = 3,486.78 × 681.15
  4. Step 4: Simplify right side
    2,324.64x = 2,375,020.20
  5. Step 5: Solve for x
    x = 2,375,020.20/2,324.64
  6. Step 6: Final answer
    x = 1,021.67

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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.