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Finding the Fourth Proportional to 443.45, 665.49 and 154.89

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Solution

The fourth proportional to 443.45, 665.49 and 154.89 is: 232.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.45 : 665.49 = 154.89 : x
  2. Step 2: Convert to fraction form
    443.45/665.49 = 154.89/x
  3. Step 3: Cross multiply
    443.45x = 665.49 × 154.89
  4. Step 4: Simplify right side
    443.45x = 103,077.75
  5. Step 5: Solve for x
    x = 103,077.75/443.45
  6. Step 6: Final answer
    x = 232.45

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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.