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Finding the Fourth Proportional to 391.33, 585.26 and 348.30

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Solution

The fourth proportional to 391.33, 585.26 and 348.30 is: 520.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.33 : 585.26 = 348.30 : x
  2. Step 2: Convert to fraction form
    391.33/585.26 = 348.30/x
  3. Step 3: Cross multiply
    391.33x = 585.26 × 348.30
  4. Step 4: Simplify right side
    391.33x = 203,844.32
  5. Step 5: Solve for x
    x = 203,844.32/391.33
  6. Step 6: Final answer
    x = 520.90

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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.