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Finding the Fourth Proportional to 838.41, 1,251.47 and 739.89

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Solution

The fourth proportional to 838.41, 1,251.47 and 739.89 is: 1,104.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.41 : 1,251.47 = 739.89 : x
  2. Step 2: Convert to fraction form
    838.41/1,251.47 = 739.89/x
  3. Step 3: Cross multiply
    838.41x = 1,251.47 × 739.89
  4. Step 4: Simplify right side
    838.41x = 925,946.44
  5. Step 5: Solve for x
    x = 925,946.44/838.41
  6. Step 6: Final answer
    x = 1,104.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.