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Finding the Fourth Proportional to 2,679.90, 4,015.05 and 2,372.70

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Solution

The fourth proportional to 2,679.90, 4,015.05 and 2,372.70 is: 3,554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.90 : 4,015.05 = 2,372.70 : x
  2. Step 2: Convert to fraction form
    2,679.90/4,015.05 = 2,372.70/x
  3. Step 3: Cross multiply
    2,679.90x = 4,015.05 × 2,372.70
  4. Step 4: Simplify right side
    2,679.90x = 9,526,509.14
  5. Step 5: Solve for x
    x = 9,526,509.14/2,679.90
  6. Step 6: Final answer
    x = 3,554.80

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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.