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Finding the Fourth Proportional to 608.99, 912.82 and 389.75

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Solution

The fourth proportional to 608.99, 912.82 and 389.75 is: 584.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.99 : 912.82 = 389.75 : x
  2. Step 2: Convert to fraction form
    608.99/912.82 = 389.75/x
  3. Step 3: Cross multiply
    608.99x = 912.82 × 389.75
  4. Step 4: Simplify right side
    608.99x = 355,769.65
  5. Step 5: Solve for x
    x = 355,769.65/608.99
  6. Step 6: Final answer
    x = 584.20

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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.