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Finding the Fourth Proportional to 7,779, 11,668.50 and 2,307

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Solution

The fourth proportional to 7,779, 11,668.50 and 2,307 is: 3,460.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,779 : 11,668.50 = 2,307 : x
  2. Step 2: Convert to fraction form
    7,779/11,668.50 = 2,307/x
  3. Step 3: Cross multiply
    7,779x = 11,668.50 × 2,307
  4. Step 4: Simplify right side
    7,779x = 26,919,229.50
  5. Step 5: Solve for x
    x = 26,919,229.50/7,779
  6. Step 6: Final answer
    x = 3,460.50

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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.