Home / 3,107.21-4,661.82-915.95

Finding the Fourth Proportional to 3,107.21, 4,661.82 and 915.95

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Solution

The fourth proportional to 3,107.21, 4,661.82 and 915.95 is: 1,374.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.21 : 4,661.82 = 915.95 : x
  2. Step 2: Convert to fraction form
    3,107.21/4,661.82 = 915.95/x
  3. Step 3: Cross multiply
    3,107.21x = 4,661.82 × 915.95
  4. Step 4: Simplify right side
    3,107.21x = 4,270,005.68
  5. Step 5: Solve for x
    x = 4,270,005.68/3,107.21
  6. Step 6: Final answer
    x = 1,374.23

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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.