Home / 3,151.40-4,721.88-1,915.05

Finding the Fourth Proportional to 3,151.40, 4,721.88 and 1,915.05

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Solution

The fourth proportional to 3,151.40, 4,721.88 and 1,915.05 is: 2,869.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,151.40 : 4,721.88 = 1,915.05 : x
  2. Step 2: Convert to fraction form
    3,151.40/4,721.88 = 1,915.05/x
  3. Step 3: Cross multiply
    3,151.40x = 4,721.88 × 1,915.05
  4. Step 4: Simplify right side
    3,151.40x = 9,042,636.29
  5. Step 5: Solve for x
    x = 9,042,636.29/3,151.40
  6. Step 6: Final answer
    x = 2,869.41

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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.