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Finding the Fourth Proportional to 645.91, 968.44 and 235

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Solution

The fourth proportional to 645.91, 968.44 and 235 is: 352.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.91 : 968.44 = 235 : x
  2. Step 2: Convert to fraction form
    645.91/968.44 = 235/x
  3. Step 3: Cross multiply
    645.91x = 968.44 × 235
  4. Step 4: Simplify right side
    645.91x = 227,583.40
  5. Step 5: Solve for x
    x = 227,583.40/645.91
  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.