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Finding the Fourth Proportional to 444.45, 661.82 and 439.56

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Solution

The fourth proportional to 444.45, 661.82 and 439.56 is: 654.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.45 : 661.82 = 439.56 : x
  2. Step 2: Convert to fraction form
    444.45/661.82 = 439.56/x
  3. Step 3: Cross multiply
    444.45x = 661.82 × 439.56
  4. Step 4: Simplify right side
    444.45x = 290,907.40
  5. Step 5: Solve for x
    x = 290,907.40/444.45
  6. Step 6: Final answer
    x = 654.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.