Home / 2,931.11-4,396.16-1,287.21

Finding the Fourth Proportional to 2,931.11, 4,396.16 and 1,287.21

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Solution

The fourth proportional to 2,931.11, 4,396.16 and 1,287.21 is: 1,930.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.11 : 4,396.16 = 1,287.21 : x
  2. Step 2: Convert to fraction form
    2,931.11/4,396.16 = 1,287.21/x
  3. Step 3: Cross multiply
    2,931.11x = 4,396.16 × 1,287.21
  4. Step 4: Simplify right side
    2,931.11x = 5,658,774.68
  5. Step 5: Solve for x
    x = 5,658,774.68/2,931.11
  6. Step 6: Final answer
    x = 1,930.59

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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.