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Finding the Fourth Proportional to 442.05, 610.10 and 255.55

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Solution

The fourth proportional to 442.05, 610.10 and 255.55 is: 352.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.05 : 610.10 = 255.55 : x
  2. Step 2: Convert to fraction form
    442.05/610.10 = 255.55/x
  3. Step 3: Cross multiply
    442.05x = 610.10 × 255.55
  4. Step 4: Simplify right side
    442.05x = 155,908.25
  5. Step 5: Solve for x
    x = 155,908.25/442.05
  6. Step 6: Final answer
    x = 352.69

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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.