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Finding the Fourth Proportional to 444.31, 666.81 and 440.90

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Solution

The fourth proportional to 444.31, 666.81 and 440.90 is: 661.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.31 : 666.81 = 440.90 : x
  2. Step 2: Convert to fraction form
    444.31/666.81 = 440.90/x
  3. Step 3: Cross multiply
    444.31x = 666.81 × 440.90
  4. Step 4: Simplify right side
    444.31x = 293,996.53
  5. Step 5: Solve for x
    x = 293,996.53/444.31
  6. Step 6: Final answer
    x = 661.69

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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.