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Finding the Fourth Proportional to 403.15, 604.77 and 129.25

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Solution

The fourth proportional to 403.15, 604.77 and 129.25 is: 193.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.15 : 604.77 = 129.25 : x
  2. Step 2: Convert to fraction form
    403.15/604.77 = 129.25/x
  3. Step 3: Cross multiply
    403.15x = 604.77 × 129.25
  4. Step 4: Simplify right side
    403.15x = 78,165.88
  5. Step 5: Solve for x
    x = 78,165.88/403.15
  6. Step 6: Final answer
    x = 193.89

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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.