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Finding the Fourth Proportional to 927.08, 1,279.56 and 628.93

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Solution

The fourth proportional to 927.08, 1,279.56 and 628.93 is: 868.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.08 : 1,279.56 = 628.93 : x
  2. Step 2: Convert to fraction form
    927.08/1,279.56 = 628.93/x
  3. Step 3: Cross multiply
    927.08x = 1,279.56 × 628.93
  4. Step 4: Simplify right side
    927.08x = 804,757.63
  5. Step 5: Solve for x
    x = 804,757.63/927.08
  6. Step 6: Final answer
    x = 868.06

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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.