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Finding the Fourth Proportional to 629.07, 868.44 and 419.50

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Solution

The fourth proportional to 629.07, 868.44 and 419.50 is: 579.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.07 : 868.44 = 419.50 : x
  2. Step 2: Convert to fraction form
    629.07/868.44 = 419.50/x
  3. Step 3: Cross multiply
    629.07x = 868.44 × 419.50
  4. Step 4: Simplify right side
    629.07x = 364,310.58
  5. Step 5: Solve for x
    x = 364,310.58/629.07
  6. Step 6: Final answer
    x = 579.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.