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Finding the Fourth Proportional to 440.12, 661.41 and 223.85

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Solution

The fourth proportional to 440.12, 661.41 and 223.85 is: 336.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.12 : 661.41 = 223.85 : x
  2. Step 2: Convert to fraction form
    440.12/661.41 = 223.85/x
  3. Step 3: Cross multiply
    440.12x = 661.41 × 223.85
  4. Step 4: Simplify right side
    440.12x = 148,058.28
  5. Step 5: Solve for x
    x = 148,058.28/440.12
  6. Step 6: Final answer
    x = 336.40

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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.