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Finding the Fourth Proportional to 392.05, 588.21 and 118.13

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Solution

The fourth proportional to 392.05, 588.21 and 118.13 is: 177.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.05 : 588.21 = 118.13 : x
  2. Step 2: Convert to fraction form
    392.05/588.21 = 118.13/x
  3. Step 3: Cross multiply
    392.05x = 588.21 × 118.13
  4. Step 4: Simplify right side
    392.05x = 69,486.72
  5. Step 5: Solve for x
    x = 69,486.72/392.05
  6. Step 6: Final answer
    x = 177.24

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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.