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Finding the Fourth Proportional to 629.70, 944.54 and 520.35

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Solution

The fourth proportional to 629.70, 944.54 and 520.35 is: 780.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.70 : 944.54 = 520.35 : x
  2. Step 2: Convert to fraction form
    629.70/944.54 = 520.35/x
  3. Step 3: Cross multiply
    629.70x = 944.54 × 520.35
  4. Step 4: Simplify right side
    629.70x = 491,491.39
  5. Step 5: Solve for x
    x = 491,491.39/629.70
  6. Step 6: Final answer
    x = 780.52

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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.