Home / 1,915.29-2,871.69-819.36

Finding the Fourth Proportional to 1,915.29, 2,871.69 and 819.36

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Solution

The fourth proportional to 1,915.29, 2,871.69 and 819.36 is: 1,228.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.29 : 2,871.69 = 819.36 : x
  2. Step 2: Convert to fraction form
    1,915.29/2,871.69 = 819.36/x
  3. Step 3: Cross multiply
    1,915.29x = 2,871.69 × 819.36
  4. Step 4: Simplify right side
    1,915.29x = 2,352,947.92
  5. Step 5: Solve for x
    x = 2,352,947.92/1,915.29
  6. Step 6: Final answer
    x = 1,228.51

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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.