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Finding the Fourth Proportional to 483.54, 724.23 and 321

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Solution

The fourth proportional to 483.54, 724.23 and 321 is: 480.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.54 : 724.23 = 321 : x
  2. Step 2: Convert to fraction form
    483.54/724.23 = 321/x
  3. Step 3: Cross multiply
    483.54x = 724.23 × 321
  4. Step 4: Simplify right side
    483.54x = 232,477.83
  5. Step 5: Solve for x
    x = 232,477.83/483.54
  6. Step 6: Final answer
    x = 480.78

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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.