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Finding the Fourth Proportional to 403, 604.48 and 129.33

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Solution

The fourth proportional to 403, 604.48 and 129.33 is: 193.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    403 : 604.48 = 129.33 : x
  2. Step 2: Convert to fraction form
    403/604.48 = 129.33/x
  3. Step 3: Cross multiply
    403x = 604.48 × 129.33
  4. Step 4: Simplify right side
    403x = 78,177.40
  5. Step 5: Solve for x
    x = 78,177.40/403
  6. Step 6: Final answer
    x = 193.99

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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.