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Finding the Fourth Proportional to 320.85, 480.54 and 243.93

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Solution

The fourth proportional to 320.85, 480.54 and 243.93 is: 365.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.85 : 480.54 = 243.93 : x
  2. Step 2: Convert to fraction form
    320.85/480.54 = 243.93/x
  3. Step 3: Cross multiply
    320.85x = 480.54 × 243.93
  4. Step 4: Simplify right side
    320.85x = 117,218.12
  5. Step 5: Solve for x
    x = 117,218.12/320.85
  6. Step 6: Final answer
    x = 365.34

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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.