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Finding the Fourth Proportional to 383.78, 575.88 and 253.92

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Solution

The fourth proportional to 383.78, 575.88 and 253.92 is: 381.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.78 : 575.88 = 253.92 : x
  2. Step 2: Convert to fraction form
    383.78/575.88 = 253.92/x
  3. Step 3: Cross multiply
    383.78x = 575.88 × 253.92
  4. Step 4: Simplify right side
    383.78x = 146,227.45
  5. Step 5: Solve for x
    x = 146,227.45/383.78
  6. Step 6: Final answer
    x = 381.02

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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.