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Finding the Fourth Proportional to 928.67, 1,393.41 and 351.41

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Solution

The fourth proportional to 928.67, 1,393.41 and 351.41 is: 527.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.67 : 1,393.41 = 351.41 : x
  2. Step 2: Convert to fraction form
    928.67/1,393.41 = 351.41/x
  3. Step 3: Cross multiply
    928.67x = 1,393.41 × 351.41
  4. Step 4: Simplify right side
    928.67x = 489,658.21
  5. Step 5: Solve for x
    x = 489,658.21/928.67
  6. Step 6: Final answer
    x = 527.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.