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Finding the Fourth Proportional to 1,272.44, 1,908.60 and 450.70

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Solution

The fourth proportional to 1,272.44, 1,908.60 and 450.70 is: 676.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.44 : 1,908.60 = 450.70 : x
  2. Step 2: Convert to fraction form
    1,272.44/1,908.60 = 450.70/x
  3. Step 3: Cross multiply
    1,272.44x = 1,908.60 × 450.70
  4. Step 4: Simplify right side
    1,272.44x = 860,206.02
  5. Step 5: Solve for x
    x = 860,206.02/1,272.44
  6. Step 6: Final answer
    x = 676.03

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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.