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Finding the Fourth Proportional to 482.91, 724.34 and 320.55

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Solution

The fourth proportional to 482.91, 724.34 and 320.55 is: 480.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.91 : 724.34 = 320.55 : x
  2. Step 2: Convert to fraction form
    482.91/724.34 = 320.55/x
  3. Step 3: Cross multiply
    482.91x = 724.34 × 320.55
  4. Step 4: Simplify right side
    482.91x = 232,185.58
  5. Step 5: Solve for x
    x = 232,185.58/482.91
  6. Step 6: Final answer
    x = 480.81

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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.