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Finding the Fourth Proportional to 629.76, 869.02 and 349.99

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Solution

The fourth proportional to 629.76, 869.02 and 349.99 is: 482.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.76 : 869.02 = 349.99 : x
  2. Step 2: Convert to fraction form
    629.76/869.02 = 349.99/x
  3. Step 3: Cross multiply
    629.76x = 869.02 × 349.99
  4. Step 4: Simplify right side
    629.76x = 304,146.57
  5. Step 5: Solve for x
    x = 304,146.57/629.76
  6. Step 6: Final answer
    x = 482.96

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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.