Home / 2,931.21-4,396.82-2,191.58

Finding the Fourth Proportional to 2,931.21, 4,396.82 and 2,191.58

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Solution

The fourth proportional to 2,931.21, 4,396.82 and 2,191.58 is: 3,287.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.21 : 4,396.82 = 2,191.58 : x
  2. Step 2: Convert to fraction form
    2,931.21/4,396.82 = 2,191.58/x
  3. Step 3: Cross multiply
    2,931.21x = 4,396.82 × 2,191.58
  4. Step 4: Simplify right side
    2,931.21x = 9,635,987.93
  5. Step 5: Solve for x
    x = 9,635,987.93/2,931.21
  6. Step 6: Final answer
    x = 3,287.37

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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.