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Finding the Fourth Proportional to 441.35, 660.05 and 392.89

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Solution

The fourth proportional to 441.35, 660.05 and 392.89 is: 587.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.35 : 660.05 = 392.89 : x
  2. Step 2: Convert to fraction form
    441.35/660.05 = 392.89/x
  3. Step 3: Cross multiply
    441.35x = 660.05 × 392.89
  4. Step 4: Simplify right side
    441.35x = 259,325.08
  5. Step 5: Solve for x
    x = 259,325.08/441.35
  6. Step 6: Final answer
    x = 587.57

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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.