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Finding the Fourth Proportional to 482.68, 724.56 and 320.68

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Solution

The fourth proportional to 482.68, 724.56 and 320.68 is: 481.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.68 : 724.56 = 320.68 : x
  2. Step 2: Convert to fraction form
    482.68/724.56 = 320.68/x
  3. Step 3: Cross multiply
    482.68x = 724.56 × 320.68
  4. Step 4: Simplify right side
    482.68x = 232,351.90
  5. Step 5: Solve for x
    x = 232,351.90/482.68
  6. Step 6: Final answer
    x = 481.38

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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.