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Finding the Fourth Proportional to 399.02, 551.10 and 301.22

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Solution

The fourth proportional to 399.02, 551.10 and 301.22 is: 416.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.02 : 551.10 = 301.22 : x
  2. Step 2: Convert to fraction form
    399.02/551.10 = 301.22/x
  3. Step 3: Cross multiply
    399.02x = 551.10 × 301.22
  4. Step 4: Simplify right side
    399.02x = 166,002.34
  5. Step 5: Solve for x
    x = 166,002.34/399.02
  6. Step 6: Final answer
    x = 416.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.