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Finding the Fourth Proportional to 994.69, 1,372.70 and 671.74

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Solution

The fourth proportional to 994.69, 1,372.70 and 671.74 is: 927.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.69 : 1,372.70 = 671.74 : x
  2. Step 2: Convert to fraction form
    994.69/1,372.70 = 671.74/x
  3. Step 3: Cross multiply
    994.69x = 1,372.70 × 671.74
  4. Step 4: Simplify right side
    994.69x = 922,103.94
  5. Step 5: Solve for x
    x = 922,103.94/994.69
  6. Step 6: Final answer
    x = 927.03

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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.