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Finding the Fourth Proportional to 251.51, 347.09 and 230.85

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Solution

The fourth proportional to 251.51, 347.09 and 230.85 is: 318.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.51 : 347.09 = 230.85 : x
  2. Step 2: Convert to fraction form
    251.51/347.09 = 230.85/x
  3. Step 3: Cross multiply
    251.51x = 347.09 × 230.85
  4. Step 4: Simplify right side
    251.51x = 80,124.57
  5. Step 5: Solve for x
    x = 80,124.57/251.51
  6. Step 6: Final answer
    x = 318.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.