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Finding the Fourth Proportional to 608.94, 912.78 and 426.27

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Solution

The fourth proportional to 608.94, 912.78 and 426.27 is: 638.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.94 : 912.78 = 426.27 : x
  2. Step 2: Convert to fraction form
    608.94/912.78 = 426.27/x
  3. Step 3: Cross multiply
    608.94x = 912.78 × 426.27
  4. Step 4: Simplify right side
    608.94x = 389,090.73
  5. Step 5: Solve for x
    x = 389,090.73/608.94
  6. Step 6: Final answer
    x = 638.96

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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.