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Finding the Fourth Proportional to 403.10, 605.19 and 279.41

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Solution

The fourth proportional to 403.10, 605.19 and 279.41 is: 419.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.10 : 605.19 = 279.41 : x
  2. Step 2: Convert to fraction form
    403.10/605.19 = 279.41/x
  3. Step 3: Cross multiply
    403.10x = 605.19 × 279.41
  4. Step 4: Simplify right side
    403.10x = 169,093.11
  5. Step 5: Solve for x
    x = 169,093.11/403.10
  6. Step 6: Final answer
    x = 419.49

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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.