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Finding the Fourth Proportional to 927.44, 1,279.38 and 628.70

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Solution

The fourth proportional to 927.44, 1,279.38 and 628.70 is: 867.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.44 : 1,279.38 = 628.70 : x
  2. Step 2: Convert to fraction form
    927.44/1,279.38 = 628.70/x
  3. Step 3: Cross multiply
    927.44x = 1,279.38 × 628.70
  4. Step 4: Simplify right side
    927.44x = 804,339.81
  5. Step 5: Solve for x
    x = 804,339.81/927.44
  6. Step 6: Final answer
    x = 867.27

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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.