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Finding the Fourth Proportional to 444.90, 667.83 and 393.87

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Solution

The fourth proportional to 444.90, 667.83 and 393.87 is: 591.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.90 : 667.83 = 393.87 : x
  2. Step 2: Convert to fraction form
    444.90/667.83 = 393.87/x
  3. Step 3: Cross multiply
    444.90x = 667.83 × 393.87
  4. Step 4: Simplify right side
    444.90x = 263,038.20
  5. Step 5: Solve for x
    x = 263,038.20/444.90
  6. Step 6: Final answer
    x = 591.23

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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.