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Finding the Fourth Proportional to 3,375.99, 4,659.21 and 2,878.47

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Solution

The fourth proportional to 3,375.99, 4,659.21 and 2,878.47 is: 3,972.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,375.99 : 4,659.21 = 2,878.47 : x
  2. Step 2: Convert to fraction form
    3,375.99/4,659.21 = 2,878.47/x
  3. Step 3: Cross multiply
    3,375.99x = 4,659.21 × 2,878.47
  4. Step 4: Simplify right side
    3,375.99x = 13,411,396.21
  5. Step 5: Solve for x
    x = 13,411,396.21/3,375.99
  6. Step 6: Final answer
    x = 3,972.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.