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Finding the Fourth Proportional to 608.31, 911.81 and 299.55

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Solution

The fourth proportional to 608.31, 911.81 and 299.55 is: 449.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.31 : 911.81 = 299.55 : x
  2. Step 2: Convert to fraction form
    608.31/911.81 = 299.55/x
  3. Step 3: Cross multiply
    608.31x = 911.81 × 299.55
  4. Step 4: Simplify right side
    608.31x = 273,130.04
  5. Step 5: Solve for x
    x = 273,130.04/608.31
  6. Step 6: Final answer
    x = 449.00

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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.