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Finding the Fourth Proportional to 618.49, 927.55 and 403.21

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Solution

The fourth proportional to 618.49, 927.55 and 403.21 is: 604.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.49 : 927.55 = 403.21 : x
  2. Step 2: Convert to fraction form
    618.49/927.55 = 403.21/x
  3. Step 3: Cross multiply
    618.49x = 927.55 × 403.21
  4. Step 4: Simplify right side
    618.49x = 373,997.44
  5. Step 5: Solve for x
    x = 373,997.44/618.49
  6. Step 6: Final answer
    x = 604.69

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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.