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Finding the Fourth Proportional to 392.29, 587.79 and 186.82

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Solution

The fourth proportional to 392.29, 587.79 and 186.82 is: 279.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.29 : 587.79 = 186.82 : x
  2. Step 2: Convert to fraction form
    392.29/587.79 = 186.82/x
  3. Step 3: Cross multiply
    392.29x = 587.79 × 186.82
  4. Step 4: Simplify right side
    392.29x = 109,810.93
  5. Step 5: Solve for x
    x = 109,810.93/392.29
  6. Step 6: Final answer
    x = 279.92

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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.