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Finding the Fourth Proportional to 629.01, 939.68 and 407.83

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Solution

The fourth proportional to 629.01, 939.68 and 407.83 is: 609.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.01 : 939.68 = 407.83 : x
  2. Step 2: Convert to fraction form
    629.01/939.68 = 407.83/x
  3. Step 3: Cross multiply
    629.01x = 939.68 × 407.83
  4. Step 4: Simplify right side
    629.01x = 383,229.69
  5. Step 5: Solve for x
    x = 383,229.69/629.01
  6. Step 6: Final answer
    x = 609.26

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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.