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Finding the Fourth Proportional to 321.93, 480.15 and 313.47

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Solution

The fourth proportional to 321.93, 480.15 and 313.47 is: 467.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.93 : 480.15 = 313.47 : x
  2. Step 2: Convert to fraction form
    321.93/480.15 = 313.47/x
  3. Step 3: Cross multiply
    321.93x = 480.15 × 313.47
  4. Step 4: Simplify right side
    321.93x = 150,512.62
  5. Step 5: Solve for x
    x = 150,512.62/321.93
  6. Step 6: Final answer
    x = 467.53

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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.