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Finding the Fourth Proportional to 791.42, 1,186.34 and 444.92

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Solution

The fourth proportional to 791.42, 1,186.34 and 444.92 is: 666.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.42 : 1,186.34 = 444.92 : x
  2. Step 2: Convert to fraction form
    791.42/1,186.34 = 444.92/x
  3. Step 3: Cross multiply
    791.42x = 1,186.34 × 444.92
  4. Step 4: Simplify right side
    791.42x = 527,826.39
  5. Step 5: Solve for x
    x = 527,826.39/791.42
  6. Step 6: Final answer
    x = 666.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.