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Finding the Fourth Proportional to 403.98, 556.12 and 350.80

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Solution

The fourth proportional to 403.98, 556.12 and 350.80 is: 482.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.98 : 556.12 = 350.80 : x
  2. Step 2: Convert to fraction form
    403.98/556.12 = 350.80/x
  3. Step 3: Cross multiply
    403.98x = 556.12 × 350.80
  4. Step 4: Simplify right side
    403.98x = 195,086.90
  5. Step 5: Solve for x
    x = 195,086.90/403.98
  6. Step 6: Final answer
    x = 482.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.