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Finding the Fourth Proportional to 443.66, 665.52 and 135.53

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Solution

The fourth proportional to 443.66, 665.52 and 135.53 is: 203.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.66 : 665.52 = 135.53 : x
  2. Step 2: Convert to fraction form
    443.66/665.52 = 135.53/x
  3. Step 3: Cross multiply
    443.66x = 665.52 × 135.53
  4. Step 4: Simplify right side
    443.66x = 90,197.93
  5. Step 5: Solve for x
    x = 90,197.93/443.66
  6. Step 6: Final answer
    x = 203.30

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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.