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Finding the Fourth Proportional to 629.48, 942.80 and 423.46

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Solution

The fourth proportional to 629.48, 942.80 and 423.46 is: 634.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.48 : 942.80 = 423.46 : x
  2. Step 2: Convert to fraction form
    629.48/942.80 = 423.46/x
  3. Step 3: Cross multiply
    629.48x = 942.80 × 423.46
  4. Step 4: Simplify right side
    629.48x = 399,238.09
  5. Step 5: Solve for x
    x = 399,238.09/629.48
  6. Step 6: Final answer
    x = 634.23

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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.