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Finding the Fourth Proportional to 791.42, 1,092.21 and 442.16

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Solution

The fourth proportional to 791.42, 1,092.21 and 442.16 is: 610.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.42 : 1,092.21 = 442.16 : x
  2. Step 2: Convert to fraction form
    791.42/1,092.21 = 442.16/x
  3. Step 3: Cross multiply
    791.42x = 1,092.21 × 442.16
  4. Step 4: Simplify right side
    791.42x = 482,931.57
  5. Step 5: Solve for x
    x = 482,931.57/791.42
  6. Step 6: Final answer
    x = 610.21

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1.5x scale

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.