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Finding the Fourth Proportional to 442.09, 609.99 and 255.55

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Solution

The fourth proportional to 442.09, 609.99 and 255.55 is: 352.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.09 : 609.99 = 255.55 : x
  2. Step 2: Convert to fraction form
    442.09/609.99 = 255.55/x
  3. Step 3: Cross multiply
    442.09x = 609.99 × 255.55
  4. Step 4: Simplify right side
    442.09x = 155,881.60
  5. Step 5: Solve for x
    x = 155,881.60/442.09
  6. Step 6: Final answer
    x = 352.60

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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.