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Finding the Fourth Proportional to 629.88, 945.26 and 259.98

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Solution

The fourth proportional to 629.88, 945.26 and 259.98 is: 390.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.88 : 945.26 = 259.98 : x
  2. Step 2: Convert to fraction form
    629.88/945.26 = 259.98/x
  3. Step 3: Cross multiply
    629.88x = 945.26 × 259.98
  4. Step 4: Simplify right side
    629.88x = 245,748.69
  5. Step 5: Solve for x
    x = 245,748.69/629.88
  6. Step 6: Final answer
    x = 390.15

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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.