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Finding the Fourth Proportional to 438.22, 658.41 and 245.98

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Solution

The fourth proportional to 438.22, 658.41 and 245.98 is: 369.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.22 : 658.41 = 245.98 : x
  2. Step 2: Convert to fraction form
    438.22/658.41 = 245.98/x
  3. Step 3: Cross multiply
    438.22x = 658.41 × 245.98
  4. Step 4: Simplify right side
    438.22x = 161,955.69
  5. Step 5: Solve for x
    x = 161,955.69/438.22
  6. Step 6: Final answer
    x = 369.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.