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Finding the Fourth Proportional to 444.29, 667.64 and 387.86

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Solution

The fourth proportional to 444.29, 667.64 and 387.86 is: 582.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.29 : 667.64 = 387.86 : x
  2. Step 2: Convert to fraction form
    444.29/667.64 = 387.86/x
  3. Step 3: Cross multiply
    444.29x = 667.64 × 387.86
  4. Step 4: Simplify right side
    444.29x = 258,948.48
  5. Step 5: Solve for x
    x = 258,948.48/444.29
  6. Step 6: Final answer
    x = 582.84

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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.