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Finding the Fourth Proportional to 1,267.25, 1,748.94 and 743.18

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Solution

The fourth proportional to 1,267.25, 1,748.94 and 743.18 is: 1,025.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.25 : 1,748.94 = 743.18 : x
  2. Step 2: Convert to fraction form
    1,267.25/1,748.94 = 743.18/x
  3. Step 3: Cross multiply
    1,267.25x = 1,748.94 × 743.18
  4. Step 4: Simplify right side
    1,267.25x = 1,299,777.23
  5. Step 5: Solve for x
    x = 1,299,777.23/1,267.25
  6. Step 6: Final answer
    x = 1,025.67

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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.