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Finding the Fourth Proportional to 1,049.39, 1,447.94 and 629.86

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Solution

The fourth proportional to 1,049.39, 1,447.94 and 629.86 is: 869.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,049.39 : 1,447.94 = 629.86 : x
  2. Step 2: Convert to fraction form
    1,049.39/1,447.94 = 629.86/x
  3. Step 3: Cross multiply
    1,049.39x = 1,447.94 × 629.86
  4. Step 4: Simplify right side
    1,049.39x = 911,999.49
  5. Step 5: Solve for x
    x = 911,999.49/1,049.39
  6. Step 6: Final answer
    x = 869.08

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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.