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Finding the Fourth Proportional to 251.76, 375.63 and 211.26

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Solution

The fourth proportional to 251.76, 375.63 and 211.26 is: 315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.76 : 375.63 = 211.26 : x
  2. Step 2: Convert to fraction form
    251.76/375.63 = 211.26/x
  3. Step 3: Cross multiply
    251.76x = 375.63 × 211.26
  4. Step 4: Simplify right side
    251.76x = 79,355.59
  5. Step 5: Solve for x
    x = 79,355.59/251.76
  6. Step 6: Final answer
    x = 315.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.