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Finding the Fourth Proportional to 399.10, 597.90 and 245.11

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Solution

The fourth proportional to 399.10, 597.90 and 245.11 is: 367.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.10 : 597.90 = 245.11 : x
  2. Step 2: Convert to fraction form
    399.10/597.90 = 245.11/x
  3. Step 3: Cross multiply
    399.10x = 597.90 × 245.11
  4. Step 4: Simplify right side
    399.10x = 146,551.27
  5. Step 5: Solve for x
    x = 146,551.27/399.10
  6. Step 6: Final answer
    x = 367.20

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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.