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Finding the Fourth Proportional to 446.18, 669.21 and 138.03

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Solution

The fourth proportional to 446.18, 669.21 and 138.03 is: 207.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.18 : 669.21 = 138.03 : x
  2. Step 2: Convert to fraction form
    446.18/669.21 = 138.03/x
  3. Step 3: Cross multiply
    446.18x = 669.21 × 138.03
  4. Step 4: Simplify right side
    446.18x = 92,371.06
  5. Step 5: Solve for x
    x = 92,371.06/446.18
  6. Step 6: Final answer
    x = 207.03

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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.