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Finding the Fourth Proportional to 403.11, 603.78 and 240.44

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Solution

The fourth proportional to 403.11, 603.78 and 240.44 is: 360.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.11 : 603.78 = 240.44 : x
  2. Step 2: Convert to fraction form
    403.11/603.78 = 240.44/x
  3. Step 3: Cross multiply
    403.11x = 603.78 × 240.44
  4. Step 4: Simplify right side
    403.11x = 145,169.84
  5. Step 5: Solve for x
    x = 145,169.84/403.11
  6. Step 6: Final answer
    x = 360.12

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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.