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Finding the Fourth Proportional to 668.94, 926.84 and 658.41

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Solution

The fourth proportional to 668.94, 926.84 and 658.41 is: 912.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.94 : 926.84 = 658.41 : x
  2. Step 2: Convert to fraction form
    668.94/926.84 = 658.41/x
  3. Step 3: Cross multiply
    668.94x = 926.84 × 658.41
  4. Step 4: Simplify right side
    668.94x = 610,237.43
  5. Step 5: Solve for x
    x = 610,237.43/668.94
  6. Step 6: Final answer
    x = 912.25

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.