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Finding the Fourth Proportional to 614.96, 922.64 and 439.39

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Solution

The fourth proportional to 614.96, 922.64 and 439.39 is: 659.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.96 : 922.64 = 439.39 : x
  2. Step 2: Convert to fraction form
    614.96/922.64 = 439.39/x
  3. Step 3: Cross multiply
    614.96x = 922.64 × 439.39
  4. Step 4: Simplify right side
    614.96x = 405,398.79
  5. Step 5: Solve for x
    x = 405,398.79/614.96
  6. Step 6: Final answer
    x = 659.23

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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.