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Finding the Fourth Proportional to 403.87, 605.81 and 266.89

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Solution

The fourth proportional to 403.87, 605.81 and 266.89 is: 400.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.87 : 605.81 = 266.89 : x
  2. Step 2: Convert to fraction form
    403.87/605.81 = 266.89/x
  3. Step 3: Cross multiply
    403.87x = 605.81 × 266.89
  4. Step 4: Simplify right side
    403.87x = 161,682.45
  5. Step 5: Solve for x
    x = 161,682.45/403.87
  6. Step 6: Final answer
    x = 400.33

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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.