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Finding the Fourth Proportional to 850.42, 1,173.56 and 477.39

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Solution

The fourth proportional to 850.42, 1,173.56 and 477.39 is: 658.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.42 : 1,173.56 = 477.39 : x
  2. Step 2: Convert to fraction form
    850.42/1,173.56 = 477.39/x
  3. Step 3: Cross multiply
    850.42x = 1,173.56 × 477.39
  4. Step 4: Simplify right side
    850.42x = 560,243.42
  5. Step 5: Solve for x
    x = 560,243.42/850.42
  6. Step 6: Final answer
    x = 658.78

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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.