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Finding the Fourth Proportional to 403.60, 603.08 and 331.24

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Solution

The fourth proportional to 403.60, 603.08 and 331.24 is: 494.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.60 : 603.08 = 331.24 : x
  2. Step 2: Convert to fraction form
    403.60/603.08 = 331.24/x
  3. Step 3: Cross multiply
    403.60x = 603.08 × 331.24
  4. Step 4: Simplify right side
    403.60x = 199,764.22
  5. Step 5: Solve for x
    x = 199,764.22/403.60
  6. Step 6: Final answer
    x = 494.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.