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Finding the Fourth Proportional to 927.90, 1,279.52 and 662.37

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Solution

The fourth proportional to 927.90, 1,279.52 and 662.37 is: 913.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.90 : 1,279.52 = 662.37 : x
  2. Step 2: Convert to fraction form
    927.90/1,279.52 = 662.37/x
  3. Step 3: Cross multiply
    927.90x = 1,279.52 × 662.37
  4. Step 4: Simplify right side
    927.90x = 847,512.35
  5. Step 5: Solve for x
    x = 847,512.35/927.90
  6. Step 6: Final answer
    x = 913.37

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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.