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Finding the Fourth Proportional to 925.45, 1,380.37 and 786.94

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Solution

The fourth proportional to 925.45, 1,380.37 and 786.94 is: 1,173.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.45 : 1,380.37 = 786.94 : x
  2. Step 2: Convert to fraction form
    925.45/1,380.37 = 786.94/x
  3. Step 3: Cross multiply
    925.45x = 1,380.37 × 786.94
  4. Step 4: Simplify right side
    925.45x = 1,086,268.37
  5. Step 5: Solve for x
    x = 1,086,268.37/925.45
  6. Step 6: Final answer
    x = 1,173.77

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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.