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Finding the Fourth Proportional to 791.61, 1,185.84 and 461.61

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Solution

The fourth proportional to 791.61, 1,185.84 and 461.61 is: 691.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.61 : 1,185.84 = 461.61 : x
  2. Step 2: Convert to fraction form
    791.61/1,185.84 = 461.61/x
  3. Step 3: Cross multiply
    791.61x = 1,185.84 × 461.61
  4. Step 4: Simplify right side
    791.61x = 547,395.60
  5. Step 5: Solve for x
    x = 547,395.60/791.61
  6. Step 6: Final answer
    x = 691.50

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Double scale
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1.5x scale

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.