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Finding the Fourth Proportional to 609.76, 912.84 and 403.75

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Solution

The fourth proportional to 609.76, 912.84 and 403.75 is: 604.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.76 : 912.84 = 403.75 : x
  2. Step 2: Convert to fraction form
    609.76/912.84 = 403.75/x
  3. Step 3: Cross multiply
    609.76x = 912.84 × 403.75
  4. Step 4: Simplify right side
    609.76x = 368,559.15
  5. Step 5: Solve for x
    x = 368,559.15/609.76
  6. Step 6: Final answer
    x = 604.43

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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.