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Finding the Fourth Proportional to 438.03, 656.60 and 163.95

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Solution

The fourth proportional to 438.03, 656.60 and 163.95 is: 245.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.03 : 656.60 = 163.95 : x
  2. Step 2: Convert to fraction form
    438.03/656.60 = 163.95/x
  3. Step 3: Cross multiply
    438.03x = 656.60 × 163.95
  4. Step 4: Simplify right side
    438.03x = 107,648.75
  5. Step 5: Solve for x
    x = 107,648.75/438.03
  6. Step 6: Final answer
    x = 245.76

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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.