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Finding the Fourth Proportional to 443.80, 665.52 and 155.20

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Solution

The fourth proportional to 443.80, 665.52 and 155.20 is: 232.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.80 : 665.52 = 155.20 : x
  2. Step 2: Convert to fraction form
    443.80/665.52 = 155.20/x
  3. Step 3: Cross multiply
    443.80x = 665.52 × 155.20
  4. Step 4: Simplify right side
    443.80x = 103,288.70
  5. Step 5: Solve for x
    x = 103,288.70/443.80
  6. Step 6: Final answer
    x = 232.74

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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.