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Finding the Fourth Proportional to 443.92, 666.88 and 281.76

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Solution

The fourth proportional to 443.92, 666.88 and 281.76 is: 423.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.92 : 666.88 = 281.76 : x
  2. Step 2: Convert to fraction form
    443.92/666.88 = 281.76/x
  3. Step 3: Cross multiply
    443.92x = 666.88 × 281.76
  4. Step 4: Simplify right side
    443.92x = 187,900.11
  5. Step 5: Solve for x
    x = 187,900.11/443.92
  6. Step 6: Final answer
    x = 423.27

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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.