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Finding the Fourth Proportional to 365.48, 548.21 and 146.20

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Solution

The fourth proportional to 365.48, 548.21 and 146.20 is: 219.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.48 : 548.21 = 146.20 : x
  2. Step 2: Convert to fraction form
    365.48/548.21 = 146.20/x
  3. Step 3: Cross multiply
    365.48x = 548.21 × 146.20
  4. Step 4: Simplify right side
    365.48x = 80,148.72
  5. Step 5: Solve for x
    x = 80,148.72/365.48
  6. Step 6: Final answer
    x = 219.30

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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.