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Finding the Fourth Proportional to 1,400.54, 2,099.45 and 851.75

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Solution

The fourth proportional to 1,400.54, 2,099.45 and 851.75 is: 1,276.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.54 : 2,099.45 = 851.75 : x
  2. Step 2: Convert to fraction form
    1,400.54/2,099.45 = 851.75/x
  3. Step 3: Cross multiply
    1,400.54x = 2,099.45 × 851.75
  4. Step 4: Simplify right side
    1,400.54x = 1,788,194.98
  5. Step 5: Solve for x
    x = 1,788,194.98/1,400.54
  6. Step 6: Final answer
    x = 1,276.79

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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.