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Finding the Fourth Proportional to 427.08, 640.98 and 234.84

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Solution

The fourth proportional to 427.08, 640.98 and 234.84 is: 352.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.08 : 640.98 = 234.84 : x
  2. Step 2: Convert to fraction form
    427.08/640.98 = 234.84/x
  3. Step 3: Cross multiply
    427.08x = 640.98 × 234.84
  4. Step 4: Simplify right side
    427.08x = 150,527.74
  5. Step 5: Solve for x
    x = 150,527.74/427.08
  6. Step 6: Final answer
    x = 352.46

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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.