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Finding the Fourth Proportional to 3,118.67, 4,303.74 and 1,721.42

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Solution

The fourth proportional to 3,118.67, 4,303.74 and 1,721.42 is: 2,375.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.67 : 4,303.74 = 1,721.42 : x
  2. Step 2: Convert to fraction form
    3,118.67/4,303.74 = 1,721.42/x
  3. Step 3: Cross multiply
    3,118.67x = 4,303.74 × 1,721.42
  4. Step 4: Simplify right side
    3,118.67x = 7,408,544.11
  5. Step 5: Solve for x
    x = 7,408,544.11/3,118.67
  6. Step 6: Final answer
    x = 2,375.55

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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.