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Finding the Fourth Proportional to 251.57, 379.67 and 245.09

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Solution

The fourth proportional to 251.57, 379.67 and 245.09 is: 369.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.57 : 379.67 = 245.09 : x
  2. Step 2: Convert to fraction form
    251.57/379.67 = 245.09/x
  3. Step 3: Cross multiply
    251.57x = 379.67 × 245.09
  4. Step 4: Simplify right side
    251.57x = 93,051.12
  5. Step 5: Solve for x
    x = 93,051.12/251.57
  6. Step 6: Final answer
    x = 369.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.