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Finding the Fourth Proportional to 400.69, 551.62 and 351.49

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Solution

The fourth proportional to 400.69, 551.62 and 351.49 is: 483.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.69 : 551.62 = 351.49 : x
  2. Step 2: Convert to fraction form
    400.69/551.62 = 351.49/x
  3. Step 3: Cross multiply
    400.69x = 551.62 × 351.49
  4. Step 4: Simplify right side
    400.69x = 193,888.91
  5. Step 5: Solve for x
    x = 193,888.91/400.69
  6. Step 6: Final answer
    x = 483.89

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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.