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Finding the Fourth Proportional to 1,279.44, 1,765.53 and 755.37

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Solution

The fourth proportional to 1,279.44, 1,765.53 and 755.37 is: 1,042.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.44 : 1,765.53 = 755.37 : x
  2. Step 2: Convert to fraction form
    1,279.44/1,765.53 = 755.37/x
  3. Step 3: Cross multiply
    1,279.44x = 1,765.53 × 755.37
  4. Step 4: Simplify right side
    1,279.44x = 1,333,628.40
  5. Step 5: Solve for x
    x = 1,333,628.40/1,279.44
  6. Step 6: Final answer
    x = 1,042.35

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1.5x scale

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.