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Finding the Fourth Proportional to 392.51, 588.38 and 172.94

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Solution

The fourth proportional to 392.51, 588.38 and 172.94 is: 259.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.51 : 588.38 = 172.94 : x
  2. Step 2: Convert to fraction form
    392.51/588.38 = 172.94/x
  3. Step 3: Cross multiply
    392.51x = 588.38 × 172.94
  4. Step 4: Simplify right side
    392.51x = 101,750.63
  5. Step 5: Solve for x
    x = 101,750.63/392.51
  6. Step 6: Final answer
    x = 259.23

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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.