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Finding the Fourth Proportional to 629.15, 943.61 and 355.77

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Solution

The fourth proportional to 629.15, 943.61 and 355.77 is: 533.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.15 : 943.61 = 355.77 : x
  2. Step 2: Convert to fraction form
    629.15/943.61 = 355.77/x
  3. Step 3: Cross multiply
    629.15x = 943.61 × 355.77
  4. Step 4: Simplify right side
    629.15x = 335,706.35
  5. Step 5: Solve for x
    x = 335,706.35/629.15
  6. Step 6: Final answer
    x = 533.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.