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Finding the Fourth Proportional to 3,415.91, 5,118.91 and 1,854.59

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Solution

The fourth proportional to 3,415.91, 5,118.91 and 1,854.59 is: 2,779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.91 : 5,118.91 = 1,854.59 : x
  2. Step 2: Convert to fraction form
    3,415.91/5,118.91 = 1,854.59/x
  3. Step 3: Cross multiply
    3,415.91x = 5,118.91 × 1,854.59
  4. Step 4: Simplify right side
    3,415.91x = 9,493,449.07
  5. Step 5: Solve for x
    x = 9,493,449.07/3,415.91
  6. Step 6: Final answer
    x = 2,779.19

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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.