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Finding the Fourth Proportional to 392.36, 588.13 and 186.75

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Solution

The fourth proportional to 392.36, 588.13 and 186.75 is: 279.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.36 : 588.13 = 186.75 : x
  2. Step 2: Convert to fraction form
    392.36/588.13 = 186.75/x
  3. Step 3: Cross multiply
    392.36x = 588.13 × 186.75
  4. Step 4: Simplify right side
    392.36x = 109,832.81
  5. Step 5: Solve for x
    x = 109,832.81/392.36
  6. Step 6: Final answer
    x = 279.93

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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.