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Finding the Fourth Proportional to 443.04, 660.44 and 418.72

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Solution

The fourth proportional to 443.04, 660.44 and 418.72 is: 624.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.04 : 660.44 = 418.72 : x
  2. Step 2: Convert to fraction form
    443.04/660.44 = 418.72/x
  3. Step 3: Cross multiply
    443.04x = 660.44 × 418.72
  4. Step 4: Simplify right side
    443.04x = 276,539.44
  5. Step 5: Solve for x
    x = 276,539.44/443.04
  6. Step 6: Final answer
    x = 624.19

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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.