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Finding the Fourth Proportional to 1,279.22, 1,764.98 and 755.14

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Solution

The fourth proportional to 1,279.22, 1,764.98 and 755.14 is: 1,041.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.22 : 1,764.98 = 755.14 : x
  2. Step 2: Convert to fraction form
    1,279.22/1,764.98 = 755.14/x
  3. Step 3: Cross multiply
    1,279.22x = 1,764.98 × 755.14
  4. Step 4: Simplify right side
    1,279.22x = 1,332,807.00
  5. Step 5: Solve for x
    x = 1,332,807.00/1,279.22
  6. Step 6: Final answer
    x = 1,041.89

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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.