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Finding the Fourth Proportional to 442.02, 610.08 and 255.61

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Solution

The fourth proportional to 442.02, 610.08 and 255.61 is: 352.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.02 : 610.08 = 255.61 : x
  2. Step 2: Convert to fraction form
    442.02/610.08 = 255.61/x
  3. Step 3: Cross multiply
    442.02x = 610.08 × 255.61
  4. Step 4: Simplify right side
    442.02x = 155,942.55
  5. Step 5: Solve for x
    x = 155,942.55/442.02
  6. Step 6: Final answer
    x = 352.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.