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Finding the Fourth Proportional to 3,107.72, 4,657.80 and 2,779.68

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Solution

The fourth proportional to 3,107.72, 4,657.80 and 2,779.68 is: 4,166.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.72 : 4,657.80 = 2,779.68 : x
  2. Step 2: Convert to fraction form
    3,107.72/4,657.80 = 2,779.68/x
  3. Step 3: Cross multiply
    3,107.72x = 4,657.80 × 2,779.68
  4. Step 4: Simplify right side
    3,107.72x = 12,947,193.50
  5. Step 5: Solve for x
    x = 12,947,193.50/3,107.72
  6. Step 6: Final answer
    x = 4,166.14

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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.