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Finding the Fourth Proportional to 768.26, 1,060.08 and 658.64

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Solution

The fourth proportional to 768.26, 1,060.08 and 658.64 is: 908.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.26 : 1,060.08 = 658.64 : x
  2. Step 2: Convert to fraction form
    768.26/1,060.08 = 658.64/x
  3. Step 3: Cross multiply
    768.26x = 1,060.08 × 658.64
  4. Step 4: Simplify right side
    768.26x = 698,211.09
  5. Step 5: Solve for x
    x = 698,211.09/768.26
  6. Step 6: Final answer
    x = 908.82

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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.