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Finding the Fourth Proportional to 365.40, 544.77 and 331.20

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Solution

The fourth proportional to 365.40, 544.77 and 331.20 is: 493.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.40 : 544.77 = 331.20 : x
  2. Step 2: Convert to fraction form
    365.40/544.77 = 331.20/x
  3. Step 3: Cross multiply
    365.40x = 544.77 × 331.20
  4. Step 4: Simplify right side
    365.40x = 180,427.82
  5. Step 5: Solve for x
    x = 180,427.82/365.40
  6. Step 6: Final answer
    x = 493.78

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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.