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Finding the Fourth Proportional to 422.42, 581.99 and 348.30

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Solution

The fourth proportional to 422.42, 581.99 and 348.30 is: 479.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.42 : 581.99 = 348.30 : x
  2. Step 2: Convert to fraction form
    422.42/581.99 = 348.30/x
  3. Step 3: Cross multiply
    422.42x = 581.99 × 348.30
  4. Step 4: Simplify right side
    422.42x = 202,705.38
  5. Step 5: Solve for x
    x = 202,705.38/422.42
  6. Step 6: Final answer
    x = 479.87

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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.