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Finding the Fourth Proportional to 482.39, 724.19 and 445.94

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Solution

The fourth proportional to 482.39, 724.19 and 445.94 is: 669.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.39 : 724.19 = 445.94 : x
  2. Step 2: Convert to fraction form
    482.39/724.19 = 445.94/x
  3. Step 3: Cross multiply
    482.39x = 724.19 × 445.94
  4. Step 4: Simplify right side
    482.39x = 322,939.44
  5. Step 5: Solve for x
    x = 322,939.44/482.39
  6. Step 6: Final answer
    x = 669.46

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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.