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Finding the Fourth Proportional to 629.16, 943.70 and 385.74

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Solution

The fourth proportional to 629.16, 943.70 and 385.74 is: 578.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.16 : 943.70 = 385.74 : x
  2. Step 2: Convert to fraction form
    629.16/943.70 = 385.74/x
  3. Step 3: Cross multiply
    629.16x = 943.70 × 385.74
  4. Step 4: Simplify right side
    629.16x = 364,022.84
  5. Step 5: Solve for x
    x = 364,022.84/629.16
  6. Step 6: Final answer
    x = 578.59

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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.