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Finding the Fourth Proportional to 403.14, 604.72 and 129.18

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Solution

The fourth proportional to 403.14, 604.72 and 129.18 is: 193.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.14 : 604.72 = 129.18 : x
  2. Step 2: Convert to fraction form
    403.14/604.72 = 129.18/x
  3. Step 3: Cross multiply
    403.14x = 604.72 × 129.18
  4. Step 4: Simplify right side
    403.14x = 78,117.73
  5. Step 5: Solve for x
    x = 78,117.73/403.14
  6. Step 6: Final answer
    x = 193.77

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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.