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Finding the Fourth Proportional to 403.44, 605.48 and 147.12

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Solution

The fourth proportional to 403.44, 605.48 and 147.12 is: 220.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.44 : 605.48 = 147.12 : x
  2. Step 2: Convert to fraction form
    403.44/605.48 = 147.12/x
  3. Step 3: Cross multiply
    403.44x = 605.48 × 147.12
  4. Step 4: Simplify right side
    403.44x = 89,078.22
  5. Step 5: Solve for x
    x = 89,078.22/403.44
  6. Step 6: Final answer
    x = 220.80

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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.