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Finding the Fourth Proportional to 1,900.87, 2,851.38 and 514.25

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Solution

The fourth proportional to 1,900.87, 2,851.38 and 514.25 is: 771.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,900.87 : 2,851.38 = 514.25 : x
  2. Step 2: Convert to fraction form
    1,900.87/2,851.38 = 514.25/x
  3. Step 3: Cross multiply
    1,900.87x = 2,851.38 × 514.25
  4. Step 4: Simplify right side
    1,900.87x = 1,466,317.15
  5. Step 5: Solve for x
    x = 1,466,317.15/1,900.87
  6. Step 6: Final answer
    x = 771.39

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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.