Home / 2,819.50-3,890.91-1,577.50

Finding the Fourth Proportional to 2,819.50, 3,890.91 and 1,577.50

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Solution

The fourth proportional to 2,819.50, 3,890.91 and 1,577.50 is: 2,176.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.50 : 3,890.91 = 1,577.50 : x
  2. Step 2: Convert to fraction form
    2,819.50/3,890.91 = 1,577.50/x
  3. Step 3: Cross multiply
    2,819.50x = 3,890.91 × 1,577.50
  4. Step 4: Simplify right side
    2,819.50x = 6,137,910.53
  5. Step 5: Solve for x
    x = 6,137,910.53/2,819.50
  6. Step 6: Final answer
    x = 2,176.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.