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Finding the Fourth Proportional to 994.24, 1,372.10 and 699.56

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Solution

The fourth proportional to 994.24, 1,372.10 and 699.56 is: 965.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.24 : 1,372.10 = 699.56 : x
  2. Step 2: Convert to fraction form
    994.24/1,372.10 = 699.56/x
  3. Step 3: Cross multiply
    994.24x = 1,372.10 × 699.56
  4. Step 4: Simplify right side
    994.24x = 959,866.28
  5. Step 5: Solve for x
    x = 959,866.28/994.24
  6. Step 6: Final answer
    x = 965.43

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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.