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Finding the Fourth Proportional to 365.74, 548.72 and 211.63

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Solution

The fourth proportional to 365.74, 548.72 and 211.63 is: 317.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.74 : 548.72 = 211.63 : x
  2. Step 2: Convert to fraction form
    365.74/548.72 = 211.63/x
  3. Step 3: Cross multiply
    365.74x = 548.72 × 211.63
  4. Step 4: Simplify right side
    365.74x = 116,125.61
  5. Step 5: Solve for x
    x = 116,125.61/365.74
  6. Step 6: Final answer
    x = 317.51

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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.