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Finding the Fourth Proportional to 440.37, 660.88 and 309.51

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Solution

The fourth proportional to 440.37, 660.88 and 309.51 is: 464.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.37 : 660.88 = 309.51 : x
  2. Step 2: Convert to fraction form
    440.37/660.88 = 309.51/x
  3. Step 3: Cross multiply
    440.37x = 660.88 × 309.51
  4. Step 4: Simplify right side
    440.37x = 204,548.97
  5. Step 5: Solve for x
    x = 204,548.97/440.37
  6. Step 6: Final answer
    x = 464.49

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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.