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Finding the Fourth Proportional to 608.14, 912.02 and 399.89

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Solution

The fourth proportional to 608.14, 912.02 and 399.89 is: 599.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.14 : 912.02 = 399.89 : x
  2. Step 2: Convert to fraction form
    608.14/912.02 = 399.89/x
  3. Step 3: Cross multiply
    608.14x = 912.02 × 399.89
  4. Step 4: Simplify right side
    608.14x = 364,707.96
  5. Step 5: Solve for x
    x = 364,707.96/608.14
  6. Step 6: Final answer
    x = 599.71

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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.