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Finding the Fourth Proportional to 383.76, 529.38 and 252.78

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Solution

The fourth proportional to 383.76, 529.38 and 252.78 is: 348.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.76 : 529.38 = 252.78 : x
  2. Step 2: Convert to fraction form
    383.76/529.38 = 252.78/x
  3. Step 3: Cross multiply
    383.76x = 529.38 × 252.78
  4. Step 4: Simplify right side
    383.76x = 133,816.68
  5. Step 5: Solve for x
    x = 133,816.68/383.76
  6. Step 6: Final answer
    x = 348.70

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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.