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Finding the Fourth Proportional to 1,267.77, 1,749.56 and 743.80

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Solution

The fourth proportional to 1,267.77, 1,749.56 and 743.80 is: 1,026.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.77 : 1,749.56 = 743.80 : x
  2. Step 2: Convert to fraction form
    1,267.77/1,749.56 = 743.80/x
  3. Step 3: Cross multiply
    1,267.77x = 1,749.56 × 743.80
  4. Step 4: Simplify right side
    1,267.77x = 1,301,322.73
  5. Step 5: Solve for x
    x = 1,301,322.73/1,267.77
  6. Step 6: Final answer
    x = 1,026.47

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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.