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Finding the Fourth Proportional to 419.43, 629.70 and 264.87

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Solution

The fourth proportional to 419.43, 629.70 and 264.87 is: 397.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.43 : 629.70 = 264.87 : x
  2. Step 2: Convert to fraction form
    419.43/629.70 = 264.87/x
  3. Step 3: Cross multiply
    419.43x = 629.70 × 264.87
  4. Step 4: Simplify right side
    419.43x = 166,788.64
  5. Step 5: Solve for x
    x = 166,788.64/419.43
  6. Step 6: Final answer
    x = 397.66

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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.