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Finding the Fourth Proportional to 422.84, 582.76 and 356.33

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Solution

The fourth proportional to 422.84, 582.76 and 356.33 is: 491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.84 : 582.76 = 356.33 : x
  2. Step 2: Convert to fraction form
    422.84/582.76 = 356.33/x
  3. Step 3: Cross multiply
    422.84x = 582.76 × 356.33
  4. Step 4: Simplify right side
    422.84x = 207,654.87
  5. Step 5: Solve for x
    x = 207,654.87/422.84
  6. Step 6: Final answer
    x = 491.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.