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Finding the Fourth Proportional to 442.20, 660.03 and 414.84

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Solution

The fourth proportional to 442.20, 660.03 and 414.84 is: 619.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.20 : 660.03 = 414.84 : x
  2. Step 2: Convert to fraction form
    442.20/660.03 = 414.84/x
  3. Step 3: Cross multiply
    442.20x = 660.03 × 414.84
  4. Step 4: Simplify right side
    442.20x = 273,806.85
  5. Step 5: Solve for x
    x = 273,806.85/442.20
  6. Step 6: Final answer
    x = 619.19

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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.