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Finding the Fourth Proportional to 1,890.54, 2,830.95 and 1,157.90

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Solution

The fourth proportional to 1,890.54, 2,830.95 and 1,157.90 is: 1,733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.54 : 2,830.95 = 1,157.90 : x
  2. Step 2: Convert to fraction form
    1,890.54/2,830.95 = 1,157.90/x
  3. Step 3: Cross multiply
    1,890.54x = 2,830.95 × 1,157.90
  4. Step 4: Simplify right side
    1,890.54x = 3,277,942.85
  5. Step 5: Solve for x
    x = 3,277,942.85/1,890.54
  6. Step 6: Final answer
    x = 1,733.87

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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.