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Finding the Fourth Proportional to 1,267.12, 1,749.09 and 743.59

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Solution

The fourth proportional to 1,267.12, 1,749.09 and 743.59 is: 1,026.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.12 : 1,749.09 = 743.59 : x
  2. Step 2: Convert to fraction form
    1,267.12/1,749.09 = 743.59/x
  3. Step 3: Cross multiply
    1,267.12x = 1,749.09 × 743.59
  4. Step 4: Simplify right side
    1,267.12x = 1,300,605.83
  5. Step 5: Solve for x
    x = 1,300,605.83/1,267.12
  6. Step 6: Final answer
    x = 1,026.43

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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.