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Finding the Fourth Proportional to 365.42, 548.15 and 148.85

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Solution

The fourth proportional to 365.42, 548.15 and 148.85 is: 223.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.42 : 548.15 = 148.85 : x
  2. Step 2: Convert to fraction form
    365.42/548.15 = 148.85/x
  3. Step 3: Cross multiply
    365.42x = 548.15 × 148.85
  4. Step 4: Simplify right side
    365.42x = 81,590.70
  5. Step 5: Solve for x
    x = 81,590.70/365.42
  6. Step 6: Final answer
    x = 223.28

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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.