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Finding the Fourth Proportional to 605.35, 908.21 and 440.51

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Solution

The fourth proportional to 605.35, 908.21 and 440.51 is: 660.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.35 : 908.21 = 440.51 : x
  2. Step 2: Convert to fraction form
    605.35/908.21 = 440.51/x
  3. Step 3: Cross multiply
    605.35x = 908.21 × 440.51
  4. Step 4: Simplify right side
    605.35x = 400,075.59
  5. Step 5: Solve for x
    x = 400,075.59/605.35
  6. Step 6: Final answer
    x = 660.90

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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.