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Finding the Fourth Proportional to 442.45, 610.55 and 255.93

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Solution

The fourth proportional to 442.45, 610.55 and 255.93 is: 353.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.45 : 610.55 = 255.93 : x
  2. Step 2: Convert to fraction form
    442.45/610.55 = 255.93/x
  3. Step 3: Cross multiply
    442.45x = 610.55 × 255.93
  4. Step 4: Simplify right side
    442.45x = 156,258.06
  5. Step 5: Solve for x
    x = 156,258.06/442.45
  6. Step 6: Final answer
    x = 353.17

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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.