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Finding the Fourth Proportional to 364.40, 546.26 and 120.80

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Solution

The fourth proportional to 364.40, 546.26 and 120.80 is: 181.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.40 : 546.26 = 120.80 : x
  2. Step 2: Convert to fraction form
    364.40/546.26 = 120.80/x
  3. Step 3: Cross multiply
    364.40x = 546.26 × 120.80
  4. Step 4: Simplify right side
    364.40x = 65,988.21
  5. Step 5: Solve for x
    x = 65,988.21/364.40
  6. Step 6: Final answer
    x = 181.09

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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.