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Finding the Fourth Proportional to 441.24, 660.84 and 258.78

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Solution

The fourth proportional to 441.24, 660.84 and 258.78 is: 387.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.24 : 660.84 = 258.78 : x
  2. Step 2: Convert to fraction form
    441.24/660.84 = 258.78/x
  3. Step 3: Cross multiply
    441.24x = 660.84 × 258.78
  4. Step 4: Simplify right side
    441.24x = 171,012.18
  5. Step 5: Solve for x
    x = 171,012.18/441.24
  6. Step 6: Final answer
    x = 387.57

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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.