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Finding the Fourth Proportional to 442.45, 610.60 and 245.95

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Solution

The fourth proportional to 442.45, 610.60 and 245.95 is: 339.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.45 : 610.60 = 245.95 : x
  2. Step 2: Convert to fraction form
    442.45/610.60 = 245.95/x
  3. Step 3: Cross multiply
    442.45x = 610.60 × 245.95
  4. Step 4: Simplify right side
    442.45x = 150,177.07
  5. Step 5: Solve for x
    x = 150,177.07/442.45
  6. Step 6: Final answer
    x = 339.42

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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.