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Finding the Fourth Proportional to 1,043.41, 1,439.58 and 629.41

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Solution

The fourth proportional to 1,043.41, 1,439.58 and 629.41 is: 868.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.41 : 1,439.58 = 629.41 : x
  2. Step 2: Convert to fraction form
    1,043.41/1,439.58 = 629.41/x
  3. Step 3: Cross multiply
    1,043.41x = 1,439.58 × 629.41
  4. Step 4: Simplify right side
    1,043.41x = 906,086.05
  5. Step 5: Solve for x
    x = 906,086.05/1,043.41
  6. Step 6: Final answer
    x = 868.39

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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.