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Finding the Fourth Proportional to 365.76, 548.16 and 243.68

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Solution

The fourth proportional to 365.76, 548.16 and 243.68 is: 365.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.76 : 548.16 = 243.68 : x
  2. Step 2: Convert to fraction form
    365.76/548.16 = 243.68/x
  3. Step 3: Cross multiply
    365.76x = 548.16 × 243.68
  4. Step 4: Simplify right side
    365.76x = 133,575.63
  5. Step 5: Solve for x
    x = 133,575.63/365.76
  6. Step 6: Final answer
    x = 365.20

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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.