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Finding the Fourth Proportional to 2,914, 4,020.18 and 1,919.80

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Solution

The fourth proportional to 2,914, 4,020.18 and 1,919.80 is: 2,648.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,914 : 4,020.18 = 1,919.80 : x
  2. Step 2: Convert to fraction form
    2,914/4,020.18 = 1,919.80/x
  3. Step 3: Cross multiply
    2,914x = 4,020.18 × 1,919.80
  4. Step 4: Simplify right side
    2,914x = 7,717,941.56
  5. Step 5: Solve for x
    x = 7,717,941.56/2,914
  6. Step 6: Final answer
    x = 2,648.57

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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.