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Finding the Fourth Proportional to 629.35, 868.49 and 380.58

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Solution

The fourth proportional to 629.35, 868.49 and 380.58 is: 525.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.35 : 868.49 = 380.58 : x
  2. Step 2: Convert to fraction form
    629.35/868.49 = 380.58/x
  3. Step 3: Cross multiply
    629.35x = 868.49 × 380.58
  4. Step 4: Simplify right side
    629.35x = 330,529.92
  5. Step 5: Solve for x
    x = 330,529.92/629.35
  6. Step 6: Final answer
    x = 525.19

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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.