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Finding the Fourth Proportional to 422.54, 583.06 and 275.38

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Solution

The fourth proportional to 422.54, 583.06 and 275.38 is: 379.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.54 : 583.06 = 275.38 : x
  2. Step 2: Convert to fraction form
    422.54/583.06 = 275.38/x
  3. Step 3: Cross multiply
    422.54x = 583.06 × 275.38
  4. Step 4: Simplify right side
    422.54x = 160,560.66
  5. Step 5: Solve for x
    x = 160,560.66/422.54
  6. Step 6: Final answer
    x = 379.99

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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.