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Finding the Fourth Proportional to 364.78, 547.26 and 121.31

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Solution

The fourth proportional to 364.78, 547.26 and 121.31 is: 181.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.78 : 547.26 = 121.31 : x
  2. Step 2: Convert to fraction form
    364.78/547.26 = 121.31/x
  3. Step 3: Cross multiply
    364.78x = 547.26 × 121.31
  4. Step 4: Simplify right side
    364.78x = 66,388.11
  5. Step 5: Solve for x
    x = 66,388.11/364.78
  6. Step 6: Final answer
    x = 181.99

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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.