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Finding the Fourth Proportional to 399.35, 551.04 and 233.60

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Solution

The fourth proportional to 399.35, 551.04 and 233.60 is: 322.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.35 : 551.04 = 233.60 : x
  2. Step 2: Convert to fraction form
    399.35/551.04 = 233.60/x
  3. Step 3: Cross multiply
    399.35x = 551.04 × 233.60
  4. Step 4: Simplify right side
    399.35x = 128,720.19
  5. Step 5: Solve for x
    x = 128,720.19/399.35
  6. Step 6: Final answer
    x = 322.33

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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.