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Finding the Fourth Proportional to 438.74, 658.09 and 164.81

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Solution

The fourth proportional to 438.74, 658.09 and 164.81 is: 247.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.74 : 658.09 = 164.81 : x
  2. Step 2: Convert to fraction form
    438.74/658.09 = 164.81/x
  3. Step 3: Cross multiply
    438.74x = 658.09 × 164.81
  4. Step 4: Simplify right side
    438.74x = 108,459.81
  5. Step 5: Solve for x
    x = 108,459.81/438.74
  6. Step 6: Final answer
    x = 247.21

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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.