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Finding the Fourth Proportional to 399.24, 551 and 233.46

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Solution

The fourth proportional to 399.24, 551 and 233.46 is: 322.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.24 : 551 = 233.46 : x
  2. Step 2: Convert to fraction form
    399.24/551 = 233.46/x
  3. Step 3: Cross multiply
    399.24x = 551 × 233.46
  4. Step 4: Simplify right side
    399.24x = 128,636.46
  5. Step 5: Solve for x
    x = 128,636.46/399.24
  6. Step 6: Final answer
    x = 322.20

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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.