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Finding the Fourth Proportional to 2,519.92, 3,779.92 and 788.56

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Solution

The fourth proportional to 2,519.92, 3,779.92 and 788.56 is: 1,182.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,519.92 : 3,779.92 = 788.56 : x
  2. Step 2: Convert to fraction form
    2,519.92/3,779.92 = 788.56/x
  3. Step 3: Cross multiply
    2,519.92x = 3,779.92 × 788.56
  4. Step 4: Simplify right side
    2,519.92x = 2,980,693.72
  5. Step 5: Solve for x
    x = 2,980,693.72/2,519.92
  6. Step 6: Final answer
    x = 1,182.85

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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.