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Finding the Fourth Proportional to 422.38, 583.00 and 256.69

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Solution

The fourth proportional to 422.38, 583.00 and 256.69 is: 354.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.38 : 583.00 = 256.69 : x
  2. Step 2: Convert to fraction form
    422.38/583.00 = 256.69/x
  3. Step 3: Cross multiply
    422.38x = 583.00 × 256.69
  4. Step 4: Simplify right side
    422.38x = 149,647.08
  5. Step 5: Solve for x
    x = 149,647.08/422.38
  6. Step 6: Final answer
    x = 354.29

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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.