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Finding the Fourth Proportional to 483.40, 724.38 and 321.04

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Solution

The fourth proportional to 483.40, 724.38 and 321.04 is: 481.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.40 : 724.38 = 321.04 : x
  2. Step 2: Convert to fraction form
    483.40/724.38 = 321.04/x
  3. Step 3: Cross multiply
    483.40x = 724.38 × 321.04
  4. Step 4: Simplify right side
    483.40x = 232,554.96
  5. Step 5: Solve for x
    x = 232,554.96/483.40
  6. Step 6: Final answer
    x = 481.08

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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.