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Finding the Fourth Proportional to 658.45, 986.64 and 350.22

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Solution

The fourth proportional to 658.45, 986.64 and 350.22 is: 524.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.45 : 986.64 = 350.22 : x
  2. Step 2: Convert to fraction form
    658.45/986.64 = 350.22/x
  3. Step 3: Cross multiply
    658.45x = 986.64 × 350.22
  4. Step 4: Simplify right side
    658.45x = 345,541.06
  5. Step 5: Solve for x
    x = 345,541.06/658.45
  6. Step 6: Final answer
    x = 524.78

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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.