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Finding the Fourth Proportional to 645.78, 968.73 and 234.88

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Solution

The fourth proportional to 645.78, 968.73 and 234.88 is: 352.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.78 : 968.73 = 234.88 : x
  2. Step 2: Convert to fraction form
    645.78/968.73 = 234.88/x
  3. Step 3: Cross multiply
    645.78x = 968.73 × 234.88
  4. Step 4: Simplify right side
    645.78x = 227,535.30
  5. Step 5: Solve for x
    x = 227,535.30/645.78
  6. Step 6: Final answer
    x = 352.34

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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.