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Finding the Fourth Proportional to 440.21, 660.32 and 115.58

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Solution

The fourth proportional to 440.21, 660.32 and 115.58 is: 173.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.21 : 660.32 = 115.58 : x
  2. Step 2: Convert to fraction form
    440.21/660.32 = 115.58/x
  3. Step 3: Cross multiply
    440.21x = 660.32 × 115.58
  4. Step 4: Simplify right side
    440.21x = 76,315.91
  5. Step 5: Solve for x
    x = 76,315.91/440.21
  6. Step 6: Final answer
    x = 173.36

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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.