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Finding the Fourth Proportional to 442.22, 610.20 and 245.70

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Solution

The fourth proportional to 442.22, 610.20 and 245.70 is: 339.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.22 : 610.20 = 245.70 : x
  2. Step 2: Convert to fraction form
    442.22/610.20 = 245.70/x
  3. Step 3: Cross multiply
    442.22x = 610.20 × 245.70
  4. Step 4: Simplify right side
    442.22x = 149,926.14
  5. Step 5: Solve for x
    x = 149,926.14/442.22
  6. Step 6: Final answer
    x = 339.03

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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.