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Finding the Fourth Proportional to 1,359.39, 2,039.43 and 629.49

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Solution

The fourth proportional to 1,359.39, 2,039.43 and 629.49 is: 944.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.39 : 2,039.43 = 629.49 : x
  2. Step 2: Convert to fraction form
    1,359.39/2,039.43 = 629.49/x
  3. Step 3: Cross multiply
    1,359.39x = 2,039.43 × 629.49
  4. Step 4: Simplify right side
    1,359.39x = 1,283,800.79
  5. Step 5: Solve for x
    x = 1,283,800.79/1,359.39
  6. Step 6: Final answer
    x = 944.39

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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.