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Finding the Fourth Proportional to 440.09, 660.10 and 115.45

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Solution

The fourth proportional to 440.09, 660.10 and 115.45 is: 173.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.09 : 660.10 = 115.45 : x
  2. Step 2: Convert to fraction form
    440.09/660.10 = 115.45/x
  3. Step 3: Cross multiply
    440.09x = 660.10 × 115.45
  4. Step 4: Simplify right side
    440.09x = 76,208.55
  5. Step 5: Solve for x
    x = 76,208.55/440.09
  6. Step 6: Final answer
    x = 173.17

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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.