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Finding the Fourth Proportional to 614.22, 922.41 and 421.98

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Solution

The fourth proportional to 614.22, 922.41 and 421.98 is: 633.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.22 : 922.41 = 421.98 : x
  2. Step 2: Convert to fraction form
    614.22/922.41 = 421.98/x
  3. Step 3: Cross multiply
    614.22x = 922.41 × 421.98
  4. Step 4: Simplify right side
    614.22x = 389,238.57
  5. Step 5: Solve for x
    x = 389,238.57/614.22
  6. Step 6: Final answer
    x = 633.71

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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.