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Finding the Fourth Proportional to 629.36, 940.17 and 454.64

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Solution

The fourth proportional to 629.36, 940.17 and 454.64 is: 679.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.36 : 940.17 = 454.64 : x
  2. Step 2: Convert to fraction form
    629.36/940.17 = 454.64/x
  3. Step 3: Cross multiply
    629.36x = 940.17 × 454.64
  4. Step 4: Simplify right side
    629.36x = 427,438.89
  5. Step 5: Solve for x
    x = 427,438.89/629.36
  6. Step 6: Final answer
    x = 679.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.