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Finding the Fourth Proportional to 629.36, 868.55 and 349.65

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Solution

The fourth proportional to 629.36, 868.55 and 349.65 is: 482.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.36 : 868.55 = 349.65 : x
  2. Step 2: Convert to fraction form
    629.36/868.55 = 349.65/x
  3. Step 3: Cross multiply
    629.36x = 868.55 × 349.65
  4. Step 4: Simplify right side
    629.36x = 303,688.51
  5. Step 5: Solve for x
    x = 303,688.51/629.36
  6. Step 6: Final answer
    x = 482.54

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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.