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Finding the Fourth Proportional to 658.83, 986.84 and 427.03

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Solution

The fourth proportional to 658.83, 986.84 and 427.03 is: 639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.83 : 986.84 = 427.03 : x
  2. Step 2: Convert to fraction form
    658.83/986.84 = 427.03/x
  3. Step 3: Cross multiply
    658.83x = 986.84 × 427.03
  4. Step 4: Simplify right side
    658.83x = 421,408.86
  5. Step 5: Solve for x
    x = 421,408.86/658.83
  6. Step 6: Final answer
    x = 639.63

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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.