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Finding the Fourth Proportional to 383.08, 528.90 and 252.31

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Solution

The fourth proportional to 383.08, 528.90 and 252.31 is: 348.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.08 : 528.90 = 252.31 : x
  2. Step 2: Convert to fraction form
    383.08/528.90 = 252.31/x
  3. Step 3: Cross multiply
    383.08x = 528.90 × 252.31
  4. Step 4: Simplify right side
    383.08x = 133,446.76
  5. Step 5: Solve for x
    x = 133,446.76/383.08
  6. Step 6: Final answer
    x = 348.35

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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.